Introduce entity permission providers

@bojanz in #53 you wrote:

New feature (resolving #9 from this issue):
#2977231: EntityPermissionProvider should provide per-bundle view permissions

but the issue summary still says:

Note that view permissions are never per-bundle cause we have no way to enforce it, we'd need query access for that (ala node access).

I wasn't confident enough to remove that from the issue summary, so could you perhaps have a look to be sure it should be removed?

Looks like the MR already contains the relevant code:

  /**
   * Whether per-bundle permissions should be provided for the 'view' operation.
   *
   * Note that self::$bundleGranularity must also be TRUE in order for this
   * setting to be taken into consideration.
   *
   * @var bool
   */
  protected $viewBundleGranularity = FALSE;

(https://git.drupalcode.org/project/drupal/-/merge_requests/2912/diffs#10...)

I just created ✨ Add "view $bundle media" permission Active where exactly that is needed, but I can't tell if it's still an issue. I think it isn't?
Thanks!

Next steps: Solve #85 and #98

We're currently writing a new permission module: https://www.drupal.org/project/entity_access_by_reference_field →

For that reason, we had a look into the different hook_entity_access implementations in core:

• node
• media
• taxonomy term
• user

all of them, but node, use "update", only node uses "edit".

Also the documentation at https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Entity%21... says

The operation that is to be performed on $entity. Usually one of:
"view"
"update"
"delete"

but the code in the MR uses "edit" instead of "update". That's quite confusing and we think there should be a consensus on one correct term!

Here's the current implementation from the MR:

    /**
   * @var array
   */
  protected $permissionMap = [
    'admin' => NULL,
    'collection' => NULL,
    'view any published' => NULL,
    'view own published' => NULL,
    'view own unpublished' => NULL,
    'edit any' => NULL,
    'edit own' => NULL,
    'delete any' => NULL,
    'delete own' => NULL,
    'create' => NULL,
  ];

So we'd stronly suggest to change "edit" to "update". Also the method names use "update", like getUpdatePermission()

My bad, the operation is always "update", but the permission is "edit" (which is still quite confusing).