Put the "Contributing" section at the top, mention the dev branch

The way things were before, it wasn't very clear that the "dev" branch
is what someone would want to work off of (need to even).

Moving the "Contributing" section to the top, and adding specific
wording about "dev", will help make this more clear.

I've also swapped out the git-send-email.io link for a direct link to
the new "make a patch" link on sourcehut, and removed the bit about
the git book (out of scope for the document anyways).

Link to the home page, not the wiki

So many aren't needed

Refer to MDN regarding format support

There are other terminal themes now

An old name, now Queue

Better links, mention the home page update process

Updated demo links

Playlist -> Queue

And other changes

Into blurb

Headings

Typo

Oops

Update to soupault 1.5

Re-publish the website when the wiki changes

This too, should be mentioned

Quick start needs tweaking too

Mention the config file is now generated (#102)

Describe the pre-commit hook

Describe the cover art option