ci: remove fortify-headers workaround

Issue has been fixed upstream.
ci: improve workaround for fortify-headers
ci: also include WLR_* symbols in the wlroots docs
ci: add workaround for modernc.org/cc
ci: generate wlroots docs with gyosu
ci: generate protocol docs with wl2html
ci: switch to new server
Add link to wlroots HTML docs
Link to Wayland's website
grim: move to sr.ht
Add link to protocol/
Update upstream wlroots URL

Moved to gitlab.fdo.
Remove release lists
kanshi: move upstream repo to sr.ht
kanshi: add v1.2.0
Update "Related work" section
slurp: add v1.2.0 and v1.3.0