Add React Quill rich text editor for Announcement Description input

[SAUMILDHANKAR]

Overview

We need to add a rich text editor (using React Quill) for the Announcement Description field in the admin UI — similar to the implementation used in the TDM Calculator (#1479). This will allow admins to create formatted announcement content (bold, italics, lists, links, etc.) and improve content management. This work is related to #2326.

Details

• The current Announcement Description field is a plain text input.
• Replace this input with a React Quill rich text editor in the admin Announcement form.
• The editor should support basic formatting options such as bold, italics, underline, lists, and links.
• Announcement content should be stored as HTML and rendered correctly on the front end.
• HTML content must be sanitized to prevent XSS or unsafe markup (e.g., <script> tags).
• Backend/API updates may be required to accept and persist HTML content for announcements.
• The front-end announcement display should safely render formatted HTML.
• Follow the pattern used in the TDM Calculator Quill editor implementation (Bump got and nodemon in /server #1479).

Action Items

[PLEASE ADD ACTION ITEMS (Dev lead/developer will add)]

Notes / Resources

• TDM Calculator React Quill implementation: Design: Create a tooltip for editing or adding links on the Admin FAQ Pages tdm-calculator#1479
• Related Food Oasis issue: Epic Feature: Announcement / Alert bar (for holidays, emergencies, etc.) #2326
• Consider using libraries like DOMPurify for sanitizing HTML content before rendering.

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