feat(ui):download functionality implemented in the frontend

[soham4abc]

This PR is a continuation for #262

Description

Download functionality works in the UI

Changes

A new route for a new API endpoint and its integration on Browse/index.js

How to test

Try selecting download as a action in the browse page. (Latest backend required)

PTAL @shaheemazmalmmd @GMishx

The Download file name issue is still there would require input from the mentors regarding this issue.

[soham4abc]

@shaheemazmalmmd @GMishx Does this need any changes??