Feat(Q): Add FE for /q sub commands

• Feature branch: DRAFT: Amazon q spike (!174614 - closed)
• Parent MR: Add base support for Amazon Q quick actions (!175633 - merged)
• Side note: This was originally developed in a private fork by GitLab team members in collaboration with Amazon's team.

What does this MR do and why?

This MR sets up the FE to present the /q sub commands. Please see the Feature branch MR for more context.

Screenshots or screen recordings

Issue	MR	Diff part of MR (has test subcommand)

How to set up and validate locally

Prerequisites:

1. You'll need to make sure you have an Ultimate license and AI features setup on your GDK. See these instructions.
2. Setup the AmazonQ configuration following these instructions. Make sure that the availability is set to On by default.

Instructions for these changes:

1. Visit an issue
2. In the comment box enter /q
3. EXPECTATION: The subcommands dev and transform should appear in the dropdown
4. Visit a MR
5. In the comment box enter /q
6. EXPECTATION: The subcommands dev, fix, and review should appear in the dropdown.
7. In the MR, go to Diffs and start leaving a comment on a diff line with /q
8. EXPECTATION: The subcommand test should appear in the dropdown.