Add gemini support

The HTML version is automatically generated from gemtext
Selfhosting: improve links
month_name: improve fallback
webring: move to bottom of page
Add RSS alternate link
make upload: upload to ecs.d2evs.net
Put title in <h1> as well as <title>
Update IRC information

Don't want to update this each time I join a new network.
Add IRC info
Add _bits

Random bits that should turn into articles eventually
Self-hosting my life
index: remove "Me elsewhere" heading
Makefile: update
markdown: add `-f footnote`
index.md: update
Add RSS feed to index.md
Implement get_description

Good enough for now
More a11y fixups

I now score 100/100/100/100 on Lighthouse
Add meta description tag

Contents still blocked on an implementation of get_description