[gtk] (8 commits) Non-fast-forward update to branch redo-doc-images

[Matthias Clasen <matthiasc src gnome org>]

The branch 'redo-doc-images' 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:

  1baf770... Remove the old doc shooter infrastructure
  d0c7fe3... Generate screenshots on the fly
  0db0b28... ci: Update doc screenshots
  564d5cc... Add a missing file

Commits added to the branch:

  158963f... gdk: Check OES_vertex_half_float GLES extension (*)
  0da75b0... gsk: Check for half float support (*)
  dacca9e... Merge branch 'check-half-float' into 'main' (*)
  fff32fa... Merge branch 'screenshot-popovers' into 'main' (*)
  3307b8c... listitemwidget: Avoid some unnecessary work (*)
  8ee6203... Remove the old doc shooter infrastructure
  a3ac414... Generate screenshots on the fly
  376d95a... Updated screenshots

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