[Enhancement] Add Markdown Preview Toggle for Comments/Reviews

[Aditya948351]

Description

Users can write comments and project reviews using Markdown, but they cannot see how it will look until they actually hit submit.

Proposed Solution

1. Add a "Write" and "Preview" tab above the comment textarea (similar to GitHub's UI).
2. When "Preview" is active, render the markdown string using react-markdown.
3. Ensure proper sanitization is applied during the preview.

Expected Outcome

A much better UX for users authoring long-form technical reviews.

[bhavyanjain3004]

Hi @Aditya948351, I’d like to work on this issue.Can you please assign it to me?

[Aditya948351]

@bhavyanjain3004 You can work on this, Assigned!