* Improve dinit service files and niri-session
Two main changes were made:
- After a discussion in davmac314/dinit#496, 2 dinit services are now
provided. The first one is 'niri', which runs niri itself, and the
second one is 'niri.target' which brings up all the dependences from
user configuration.
- Made the behaviour of 'niri-session' when running under dinit closer
to the behaviour when running under systemd. In particular, now the
script wait for service completion, because some login managers shut
the session down the moment the startup script completes.
* Update paths in docs
* Add wiki based on mkdocs
* wording fixes
* fix github bg color on narrow
* Fix left sidebar section headers being bigger than pages
* fix hover accent
* fix list rendering on fractional layout
* fix videos
* fix automatic full links
* remove redundant commented css
* improve dark mode contrast
* update pygments for better child node coloring
* update logo
* remove blank lines
* add systemd language hint
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Co-authored-by: Ivan Molodetskikh <yalterz@gmail.com>