[doc] add area tutorials

Deactivate knl tutorial checks for now.
6 jobs for tutorials in 4 minutes and 31 seconds (queued for 9 minutes and 43 seconds)
Status Job ID Name Coverage
  Style
passed #57115
nix kvm
checkpatch

00:00:13

passed #57114
nix kvm
repoquality

00:00:03

passed #57116
nix kvm
style:docs

00:00:45

 
  Build
passed #57117
nix kvm
make:generic

00:00:40

passed #57119
knl
make:knl

00:02:48

passed #57118
nix kvm
make:out-of-tree

00:00:53