Add Unit Tests for BumbleDocGen\LanguageHandler\Php\Plugin Namespace

[seanmcn]

We need to verify the code in BumbleDocGen\LanguageHandler\Php\Plugin namespace is functioning as intended. Here’s how you can help:

1. Write Tests:

   • Use PHPUnit to create tests for all classes and methods in this directory.
   • Ensure the tests are comprehensive and adhere to the project’s testing conventions.

2. Run Tests Locally:

   • Use composer run-script test to run the tests on your local machine and ensure they pass.

3. Create Pull Request:

   • Once ready, create a pull request to the 1.x.x branch with your tests.
   • GitHub will automatically run your tests again when you create the pull request.

4. Need Help?

   • If you encounter any issues or require assistance, comment on the issue and a maintainer will assist you.