Implement Search Bar in Announcements Page

[RyanSh3n]

Notion ticket link

Ticket Name

Implementation description

• Updated search bar to search for rooms
• Updated announcements rendering to render rooms searched for.

Steps to test

1. docker compose for front-end

What should reviewers focus on?

• Front-End UI and functionality (in ./frontend/src/pages/announcements/AnnouncementsGroups.tsx)

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR