Add DDEV Drupal Contrib integration

With it I can now execute, for example:

ddev phpunit --filter RestClientTest                      
PHPUnit 11.5.34 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.3.23

....................                                              20 / 20 (100%)

Time: 00:00.087, Memory: 8.00 MB

OK, but there were issues!
Tests: 20, Assertions: 41, PHPUnit Deprecations: 61.

I'm able to access the site, but I'm getting errors on `ddev composer require drush/drush`

drush can now be installed with ddev composer require drush/drush

But next issue is that ddev drush cr gives an error

PHP Fatal error:  Uncaught AssertionError: assert($this->bootstrap instanceof DrupalBoot8) in /var/www/html/vendor/drush/drush/src/Boot/BootstrapManager.php:119
Stack trace:
#0 /var/www/html/vendor/drush/drush/src/Boot/BootstrapManager.php(119): assert()
#1 /var/www/html/vendor/drush/drush/src/Boot/BootstrapManager.php(108): Drush\Boot\BootstrapManager->bootstrap()
#2 /var/www/html/vendor/drush/drush/src/Application.php(165): Drush\Boot\BootstrapManager->setUri()
#3 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(97): Drush\Application->refineUriSelection()
#4 /var/www/html/vendor/drush/drush/src/Runtime/Runtime.php(40): Drush\Runtime\Runtime->doRun()
#5 /var/www/html/vendor/drush/drush/drush.php(140): Drush\Runtime\Runtime->run()
#6 /var/www/html/vendor/bin/drush.php(119): include('...')
#7 {main}
  thrown in /var/www/html/vendor/drush/drush/src/Boot/BootstrapManager.php on line 119

I've updated the README (copied from OG) and it's working as expected.

After cloning the module locally, you can now:

ddev poser
ddev symlink-project
ddev install

Ready for review 🙂

I did test-drive this and it worked well based on the steps of the README .

 [notice] Performed install task: install_configure_form
 [notice] Performed install task: install_finished
 [success] Installation complete. (Admin)
 [success] User name: admin  User password: tJxdXWdAmi
 [success] Module salesforce has been installed. (Permissions - Configure)
 aaron  villamvonat  ~  gizra  salesforce   3543367-add-ddev-drupal  $  ddev install^C
 aaron  villamvonat  ~  gizra  salesforce   3543367-add-ddev-drupal  SIGINT  $  ddev phpunit
PHPUnit 11.5.35 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.3.17

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