Ported the first few documentation comments in `gio/gaction.c` to gi-docgen
This ports the first few documentation comments in gio/gaction.c
to gi-docgen. Any feedback/suggestions regarding the changes are appreciated so that they can be incorporated in further changes.
This addresses #3250 . @pwithnall Please review this if possible. Thanks!
Edited by Sudhanshu Tiwari