Add Unit Tests for BumbleDocGen\Core\Renderer\Breadcrumbs Namespace

[seanmcn]

It's important to ensure that the code in BumbleDocGen\Core\Renderer\Breadcrumbs namespace is working correctly. Here’s how you can contribute:

1. Write Tests:

   • Use PHPUnit to write tests for all classes and methods in this directory.
   • Make sure the tests are thorough and follow the existing testing conventions in the project.

2. Run Tests Locally:

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

3. Create Pull Request:

   • When 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 need clarification, comment on the issue and a maintainer will help you out.