ci: generate & publish docs

why not? also could help with newcomers
3 jobs for bilelmoussaoui/docs in 5 minutes and 19 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #926778
docs

00:05:19

passed #926776
flatpak
flatpak

00:04:35

passed #926777
lint

00:00:09

 
Name Stage Failure
failed
docs Test
[59/101] Compiling C object subprojects/libhandy/src/libhandy-1.so.0.p/hdy-squeezer.c.o
[60/101] Compiling C object subprojects/libhandy/src/libhandy-1.so.0.p/hdy-window-handle-controller.c.o
[61/101] Compiling C object subprojects/libhandy/src/libhandy-1.so.0.p/hdy-view-switcher-button.c.o
[62/101] Compiling C object subprojects/libhandy/src/libhandy-1.so.0.p/hdy-view-switcher-bar.c.o
[63/101] Compiling C object subprojects/libhandy/src/libhandy-1.so.0.p/hdy-window-mixin.c.o
[64/101] Compiling C object subprojects/libhandy/src/libhandy-1.so.0.p/hdy-stackable-box.c.o
ninja: build stopped: subcommand failed.
Found runner: ['/usr/bin/ninja']
ERROR: Job failed: exit code 1