CI update, add missing doc files

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: julia-actions/setup-julia@v1
+      - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.julia-version }}
           arch: ${{ matrix.julia-arch }}
@@ -47,11 +47,11 @@ jobs:
   Documentation:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@latest
         with:
           version: 1
-      - uses: julia-actions/cache@v1
+      - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-docdeploy@v1
         with:
           prefix: xvfb-run

docs/src/doc/GObject_reference.md

@@ -0,0 +1,48 @@
+# GObject Reference
+
+The GObject library contains GLib's type system, including the `GObject` type, subclasses
+of which can include properties and signals.
+
+## Properties
+
+Properties of `GObject` are mapped onto Julia properties.
+
+```@docs
+Gtk4.GLib.set_gtk_property!
+Gtk4.GLib.get_gtk_property
+Gtk4.GLib.bind_property
+Gtk4.GLib.unbind_property
+Gtk4.GLib.setproperties!
+```
+
+These are functions that are intended to be used in the REPL to look up
+information about `GObject`s and their properties and signals.
+
+```@docs
+Gtk4.GLib.propertyinfo
+Gtk4.GLib.gtk_propertynames
+```
+
+## Signals
+
+```@docs
+Gtk4.GLib.signal_handler_is_connected
+Gtk4.GLib.signal_handler_disconnect
+Gtk4.GLib.signal_handler_block
+Gtk4.GLib.signal_handler_unblock
+Gtk4.GLib.signal_emit
+Gtk4.GLib.waitforsignal
+Gtk4.GLib.on_notify
+Gtk4.GLib.signalnames
+Gtk4.GLib.signal_return_type
+Gtk4.GLib.signal_argument_types
+```
+
+## GObject type system
+
+These functions are not typically needed by most users.
+
+```@docs
+Gtk4.GLib.g_type
+Gtk4.GLib.find_leaf_type
+```

docs/src/doc/Gio_reference.md

@@ -0,0 +1,31 @@
+# Gio Reference
+
+The Gio library contains functionality for I/O (most of which overlaps functionality in
+the Julia Base library) and machinery for applications, such as actions and menus.
+
+## Actions and action groups
+```@docs
+Gtk4.GLib.GSimpleAction(::AbstractString)
+Gtk4.GLib.add_action
+Gtk4.GLib.add_stateful_action
+Gtk4.GLib.set_state
+```
+
+## Menus
+
+```@docs
+Gtk4.GLib.GMenuItem(::Any)
+```
+
+## GApplication
+
+```@docs
+Gtk4.GLib.GApplication(::Any,::Any)
+Gtk4.GLib.run
+```
+
+## Miscellaneous
+
+```@docs
+Gtk4.GLib.cancel_after_delay
+```