doc/sphinx: Add documentation for the logging/debugging framework

This details the logging/debugging framework with the latest changes,
making use of the groups added by "weston-log: Start adding
documentation" and "libweston/log: Add 'wlog' group".

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
2 jobs for scope-type in 1 minute and 49 seconds (queued for 6 minutes and 41 seconds)
Status Job ID Name Coverage
  Container Prep
passed #428268
container_prep

00:00:20

 
  Build
passed #428269
build-native-meson

00:01:28