Accesibility: missing "jump to content" link

[jonpincus]

Issue Summary

There's no "skip to content" link allowing users with screenreaders to skip over all the headers.

Steps to Reproduce

Go to the main page of any lemmy site. Click tab. It should take you to a "jump to content" link, but none appears.

The screenshot of Reddit's interface illustrates what should happen. The "jump to content" link in the image is initally invisible, but appears when I hit a tab.

Technical details

https://www.useragentman.com/blog/2016/12/15/implementing-an-accessible-skip-navigation-link-requires-more-thought-than-youd-think/ is a good discussion of how to provide this functionality (although a little old, not sure if best practices have evolved since then)

[skspade]

I'm willing to pick this up @SleeplessOne1917 is this something you all would want?

[SleeplessOne1917]

If @dessalines and @Nutomic are good with it, it's fine by me. Accessibility is never a bad thing.

[skspade]

Agreed, I'll pick this up!