Add wm-actions example (WayfireWM#1310)

* Add `wm-actions` example

* Comment `wm-actions` example

Author: alexherbo2

wayfire.ini

@@ -64,6 +64,7 @@ plugins = \
   switcher \
   vswitch \
   window-rules \
+  wm-actions \
   wobbly \
   wrot \
   zoom
@@ -210,6 +211,15 @@ command_light_down = light -U 5
 
 # Windows ──────────────────────────────────────────────────────────────────────
 
+# Actions related to window management functionalities.
+#
+# Example configuration:
+#
+# [wm-actions]
+# toggle_fullscreen = <super> KEY_F
+# toggle_always_on_top = <super> KEY_X
+# toggle_sticky = <super> <shift> KEY_X
+
 # Position the windows in certain regions of the output.
 [grid]
 #