feat(wm): add force-focus command

On rare occasions and usually with Firefox, the desired application will
fail to be focused with the regular focus commands. This commit
introduces a new command, force-focus, which can be used to simulate a
left-click on a window that has failed to take focus, since this is what
I have to do to work around the issue anyway.

komorebic.lib.ahk

@@ -60,6 +60,10 @@ Close() {
     RunWait, komorebic.exe close, , Hide
 }
 
+ForceFocus() {
+    RunWait, komorebic.exe force-focus, , Hide
+}
+
 CycleFocus(cycle_direction) {
     RunWait, komorebic.exe cycle-focus %cycle_direction%, , Hide
 }