Add auto-discovery link for RSS Feeds

[kevincox]

Is your feature request related to a problem? Please describe.
Right now for a user it is hard to find the RSS feed. They need to think to go to the channel page and click the overflow menu to find the option to copy the RSS URL.

Describe the solution you'd like
An auto-discovery link should be added so that browsers, browser extensions and other tools can automatically discover and highlight the existence of a feed to the user.

For odysee the link would look something like this in the head section of the page.

<link rel=alternate title="Veritasium on Odysee" type=application/rss+xml href="/$/rss/@veritasium:f">

I think it would be ideal to place this on both channel pages and video pages.

This should improve the user experience, some examples:

1. If the user is viewing a video they can click the RSS icon in their browser to subscribe to the channel.
2. If the user wants to subscribe to a channel they can just paste the channel URL (or any video URL) into their feed reader and most readers will automatically find the feed.

Describe alternatives you've considered

Do nothing: It is harder for users, and crawlers to discover the RSS feeds.