libinput: add page (#15544)

Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/linux/libinput.md

@@ -0,0 +1,24 @@
+# libinput
+
+> Interface with libinput.
+> More information: <https://wayland.freedesktop.org/libinput/doc/latest/>.
+
+- List all devices recognized by libinput:
+
+`sudo libinput list-devices`
+
+- Print all libinput events:
+
+`sudo libinput debug-events`
+
+- Show a GUI to visualize libinput's events:
+
+`sudo libinput debug-gui`
+
+- Debug tablet axis values:
+
+`sudo libinput debug-tablet`
+
+- Display help:
+
+`libinput -h`