Download API Endpoints

[frattezi]

• POST /downloads — start a download (accepts youtubeUrl and quality)
• GET /downloads — list all downloads with status
• GET /downloads/:id — get single download details/progress
• GET /downloads/:id/qualities — list available qualities for a URL

We will need all of those, but, if we don't have the code for the endpoint yet, write a simple return status: 200.
The first one we're actually working should be POST /downloads

[frattezi]

Maybe a good opportunity to try automatic CLI endpoint creation for Nest.JS