Enhance ontology change request attribution and begin UJS replacement

[jvendetti]

This pull request resolves #323 by enhancing the attribution details in GitHub issues automatically generated from ontology change requests. If a user has provided their GitHub username and/or ORCID iD in their account settings, this information will now be included in the issue body for clear attribution.

The GitHub username is prefixed with an ‘@’ symbol in the issue body, triggering GitHub notifications for the user and drawing their attention to the issue through GitHub’s built-in notifications functionality.

Summary of additional changes:

• Added a new ERB "footer" template for issue attribution, ensuring consistent presentation across different types of change requests
• Transitioned some of the code for handling change requests from Rails UJS to Turbo Streams and Stimulus
• Refactored the code in app/lib/kgcl/renderers to include a new base class that centralizes common methods
• Fixed broken unit tests

[jvendetti]

Screenshot of enhanced issue attribution and incorporation of GitHub mentions: