[EASI-4636] GRB discussions card

[aterstriep]

EASI-4636

Figma
Figma with empty states

Description

• Added Discussions section to GRB Review tab
• <DiscussionPost> component displays single discussion post
  • "Reply" button and "3 replies in this discussion" text were changed to match discussion panel (confirmed with Zoe)
• Unit tests

Future changes for followup PR once work for EASI-4634 is completed:

• Display discussion content in TipTap component
• Truncate discussion content with read more/less buttons
  • This will involve updates to our TruncatedText component, so I'm waiting until the MentionTextArea props are finalized before making these changes.

How to test this change

• Go to GRB review tab of system intake from seeded data
• Discussions section should match Figma
• Unit tests should cover different states:
  • src/views/GovernanceReviewTeam/GRBReview/Discussions.test.tsx
  • src/views/DiscussionBoard/DiscussionPost/index.test.tsx

PR Author Checklist

• I have provided a detailed description of the changes in this PR.
• I have provided clear instructions on how to test the changes in this PR.
• I have updated tests or written new tests as appropriate in this PR.

PR Reviewer Guidelines

• It's best to pull the branch locally and test it, rather than just looking at the code online!
• When approving a PR, provide a reason why you're approving it
  • e.g. "Approving because I tested it locally and all functionality works as expected"
  • e.g. "Approving because the change is simple and matches the Figma design"
• Don't be afraid to leave comments or ask questions, especially if you don't understand why something was done! (This is often a great time to suggest code comments or documentation updates)
• Check that all code is adequately covered by tests - if it isn't feel free to suggest the addition of tests.

[aterstriep]

Reverting this to draft to address changes now that #2882 is merged.

[ClayBenson94]

Thanks for making these changes! Things look good from local testing, so I'm happy to just get this merged and we can loop back on if there's any more changes with seed/real API data that we end up needing to make, but from what I can see here things are all set!