feat(users/Profpatsch): add my xmonad config

Change-Id: I41d7c3029990f5f1ae56a767331781b38e69997c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9077
Autosubmit: Profpatsch <mail@profpatsch.de>
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

users/Profpatsch/hie.yaml

@@ -28,3 +28,7 @@ cradle:
       component: "lib:ircmail"
     - path: "./httzip/Httzip.hs"
       component: "httzip:exe:httzip"
+    - path: "./declib/Declib.hs"
+      component: "declib:exe:declib"
+    - path: "./my-xmonad/Xmonad.hs"
+      component: "my-xmonad:exe:xmonad"