Fix the issues reported by phpcs

I will work on this issue.

Providing the patch to solve all the PHPCS issues.
Kindly review.

+dependencies:
+  - drupal:token

The Token module is not a Drupal core module. It is also not necessary to declare it as dependency, since this module checks first the Token module is installed.

 /**
 /**
- * Returns a random number between min and max.
+ * Return a random number between min and max.
  *
  * @param {int} min
  *   The minimal value.

The existing comment is already correct, given that is a comment for a function or a method. It is @param {int} min that needs to be fixed, as it needs to be fixed the other parameter definition.

+/**
+ * Provide Size values for the Browser.
+ */

The verb must use the Simple Present and the third person singular. Size and Browser do not need to be capitalized. The class description can be better written.

    * BrowserSize constructor.
    *
    * @param int $min_width
+   *   Minimum width value.
    * @param int $max_width
+   *   Maximum width value.
    * @param string $label
+   *   Label for preview.
    * @param string $short_label
+   *   Short label for preview.

The class name does not include its namespace. The descriptions are missing articles.

+   * Get Minimum width.
+   *
    * @return int
+   *   Minimum width value.

This is also wrong for the reasons already said for the other lines.

   /**
+   * The link size.
+   *
    * @var array
    */
   protected $sizes;

Since that property contains an array, it cannot be described as link size. Also, what is, exactly, a link size in this case?

   /**
+   * Return the lable of link.
+   *
    * @return string
+   *   Link label.

lable is a typo.

   /**
+   * Return the Open External Label.
+   *
    * @return string
+   *   External Label.

Return is probably not the best verb to use for a method, or it should be used for almost all the methods and functions.

+/**
+ * Preview link editing using edit form.
+ */

That description does not make sense. It is more probable that is the class for the edit form used for the preview link.

    * @return \Drupal\Core\Link
+   *   URL link for previewing the entity.

It is not necessary to say URL link, as a link is necessarily a URL.

updating the patch as it shows this error error: patch failed: dpl.info.yml:4, error: dpl.info.yml: patch does not apply while applying and also addressing some changes listed in #5, please review.

I will work on this issues.

Added the patch for fixes of most of listed issues. please review.

 /**
- * Returns a random number between min and max.
- *
- * @param {int} min
+ *@param {int} min
  *   The minimal value.
  * @param {int} max
  *   The maximum value.

The short description should not be removed.
How the parameters are described is correct, since that is for a JavaScript file. (I did not notice that, earlier, and I wrongly reported @param {int} min should be fixed.)

   /**
+   * Minimum width value.
+   *
    * @var int
    */
   protected $minWidth;
 
   /**
+   * Maximum width value.
+   *
    * @var int
    */
   protected $maxWidth;
 
   /**
+   * Label for preview.
+   *
    * @var string
    */
   protected $label;
 
   /**
+   * Short label for preview.
+   *
    * @var string
    */

Those descriptions are all missing an article or two.

    * BrowserSize constructor.
    *
    * @param int $min_width
+   *   Minimum width value.
    * @param int $max_width
+   *   Maximum width value.
    * @param string $label
+   *   Label for preview.
    * @param string $short_label
+   *   Short label for preview.

The class name is missing its namespace.

   /**
+   * Minimum width value.
    * @return int
    */
   public function getMinWidth() {

The description is missing an article, and it could be better written.
There is a missing empty line before @return.
The return value is not described.

   /**
+   * Get the Label for preview.
+   *
    * @return string
+   *   Label.
    */

When Label is not the first word in a sentence, it is not written in capital case.
The verb used in a method description must use the Simple Present and the third person singular.
The return value description can be written better.

    * Controller for the preview page.
    *
+   * @param Drupal\node\NodeInterface $node
+   *   The Node.
+   * @param Drupal\dpl\Entity\DecoupledPreviewLink $decoupled_preview_link
+   *   The consumer preview links.
    * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The HTTP request.

Since that documentation comment is changed, also the short description should be changed: It misses an article.
Node, since it is not the first word in a sentence, must be spelled differently.

   /**
-   * Returns a preview link for a given consumer.
+   * Return a preview link for a given consumer.

The verb was already correct. What needs to be change is the article used before preview link.

   /**
+   * The link size.
+   *
    * @var array
    */
   protected $sizes;

Since that is an array, it cannot be the link size. Either that variable does not contain an array, or it cannot be described in that way.

+   * Default size.
+   *
    * @var string
    */

An article is missing from the description.

    * @return \Drupal\dpl\PreviewLinkInstance
+   *   PreviewLink Instance.

That does not describe the return value; it is just the class name of the returned object spelled as two word.
Instance is not spelled correctly. (It is not the first word in a sentence.)

+/**
+ * Preview link creating using add form.
+ */
 class PreviewLinkAddForm extends PreviewLinkEditForm {

That description is not grammatically correct, since there are two present participles in row.
Even if that were correct, the description does not make sense.

+  /**
+   * Constructs a new service object.
+   *

The description must include the class name and its namespace.

-        '#markup' => $this->t('Enable the token module to see a list of available tokens.')
+        '#markup' => $this->t('Enable the token module to see a list of available tokens.'),

Since that line is changed, the module name should also be written in title case.

   /**
+   * Get the Defination of the previewed instance.
+   *
    * @return \Drupal\dpl\PreviewLinkInstance
+   *   URL link of the Instance.

There is the same typo already reported.

Hi,

MR #14 applied successfully.

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib/dpl (8.x-2.x)
$ curl https://git.drupalcode.org/project/dpl/-/merge_requests/2.diff | patch -p1
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 18507    0 18507    0     0  48736      0 --:--:-- --:--:-- --:--:-- 48831
patching file README.md
patching file config/schema/dpl.schema.yml
patching file dpl.info.yml
patching file dpl.libraries.yml
patching file dpl.routing.yml
patching file src/BrowserSize.php
patching file src/Controller.php
patching file src/DecoupledPreviewLinks.php
patching file src/Entity/DecoupledPreviewLink.php
patching file src/Entity/DecoupledPreviewLinkListBuilder.php
patching file src/Form/PreviewLinkAddForm.php
patching file src/Form/PreviewLinkDeleteForm.php
patching file src/Form/PreviewLinkEditForm.php
patching file src/Plugin/Deriver/PreviewLinkLocalTaskDeriver.php
patching file src/Plugin/Menu/LocalTask/DecoupledPreviewLinkTask.php
patching file src/PreviewLinkInstance.php
patching file tests/src/Nightwatch/TestSetup.php

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib
$ phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,info,txt,md,js,yml dpl/

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib
$

No remaining issues or errors.