Add Support for triggering workflows in Github

Thanks, this looks neat.
Can we get a test added and I'm happy to put this out as 3.3.0

See \Drupal\Tests\build_hooks_bitbucket\Kernel\BitbucketBuildHooksTest for an example, there are utility methods that make it pretty straightforward to add a new test.

Here's a patch with implemented tests.

Sorry, the patch in the previous comment was empty.

Corrected tests. Sorry for the multiple comments.

And here is the patch with corrected code styling/standards.

1. +++ b/modules/build_hooks_github/src/Plugin/FrontendEnvironment/GithubFrontendEnvironment.php
   @@ -0,0 +1,121 @@
   +  /**
   +   * {@inheritdoc}
   +   */
   +  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
   +    return new static(
   +      $configuration,
   +      $plugin_id,
   +      $plugin_definition
   +    );
   +  }
   

   do we need this if we're not injecting any services?

   happy to leave it in

2. +++ b/modules/build_hooks_github/src/Plugin/FrontendEnvironment/GithubFrontendEnvironment.php
   @@ -0,0 +1,121 @@
   +    $config_factory = \Drupal::configFactory();
   

   Ah - we're implementing ContainerFactoryPluginInterface, but we're not using DI

   Can we inject this?

   And the messenger

3. +++ b/modules/build_hooks_github/src/Plugin/FrontendEnvironment/GithubFrontendEnvironment.php
   @@ -0,0 +1,121 @@
   +    // This plugin adds to the deployment form a fieldset displaying the
   +    // latest deployments:
   +    $form = [];
   +
   ...
   +  public static function refreshDeploymentTable(array $form, FormStateInterface $form_state) {
   +    return $form['latestGithubDeployments']['table'];
   

   this doesn't look implemented, so can be removed.

   No need for the ajax callback (refreshDeploymentTable) and the comment about 'latest deployments' can go too

Tests look great, just some minor cleanup now.

Updated the patch:

- Now injecting the config factory
- Removed the messenger since it was not used anywhere.
- Removed the ajax callback (refreshDeploymentTable) and the comment about 'latest deployments'

Thanks, cutting 3.3.0