[devhelp] (28 commits) Non-fast-forward update to branch ebassi/gidocgen

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'ebassi/gidocgen' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  763dd21... Add top-level 'doc' directory under data directories
  ac0f85b... Set the User-Agent
  35f3568... Inject custom style sheet into the WebView

Commits added to the branch:

  d56f13b... Update British English translation (*)
  423e483... Update Chinese (China) translation (*)
  847547e... Update Hebrew translation (*)
  51050cc... Update Dutch translation (*)
  0db498d... Release 40.0 (*)
  b322581... ci: Add job for Flatpak build (*)
  1d5c8da... Revert "Revert "Revert the introduction of the amtk library (*)
  6dc3b18... Help: Update App icon as SVG (*)
  b75a4f5... Update maintenance state (*)
  c830a66... Fix compiler warning (*)
  1991db1... Open up developement for Devhelp 41 (*)
  e16691c... Handle deprecated API in WebKitGTK >= 2.32 (*)
  80385cf... build: Move post-install script to its own directory (*)
  77525e3... build: Move Flatpak files under build-aux (*)
  45d7bf9... Remove the attic directory (*)
  336afc7... Remove AUTHORS file (*)
  c97080e... Rename "HACKING" file (*)
  26a49a9... Update the contribution guidelines (*)
  fc35245... Add an editorconfig file (*)
  d09782a... build: Split up the summary (*)
  2b8cf2e... Consolidate Flatpak utility scripts (*)
  c8cbe1c... build: Quiet the introspection scanner (*)
  3ab8dbf... tests: Validate the desktop file (*)
  8ad7349... Drop the "simple" menu (*)
  4358d94... Follow the HIG for the main menu (*)
  18a07f0... Add top-level 'doc' directory under data directories
  46c1251... Set the User-Agent
  b6e43ba... Inject custom style sheet into the WebView

(*) This commit already existed in another branch; no separate mail sent