adding desktop config

modules/home-manager/sxhkd.nix

@@ -0,0 +1,47 @@
+{ config, lib, pkgs, ... }:
+
+{
+  xdg.configFile."sxhkd/sxhkdrc".text = ''
+    # terminal / launcher
+    super + Return
+        ${config.my.defaults.terminal}
+    super + space
+        dmenu_run
+
+    # close window / quit bspwm
+    super + q
+        bspc node -c
+    super + alt + Escape
+        bspc quit
+
+    # focus window
+    super + {Left,Down,Up,Right}
+        bspc node -f {west,south,north,east}
+
+    # move (swap) window
+    super + shift + {Left,Down,Up,Right}
+        bspc node -s {west,south,north,east}
+
+    # resize window
+    super + alt + {Left,Down,Up,Right}
+        bspc node -z {left -20 0,bottom 0 20,top 0 -20,right 20 0}
+
+    # go to workspace / send window to workspace
+    super + {_,shift + }{1-9}
+        bspc {desktop -f,node -d} '^{1-9}'
+
+    # workspace next/previous
+    super + ctrl + {Left,Right}
+        bspc desktop -f {prev,next}.local
+
+    # fullscreen / floating
+    super + f
+        bspc node -t "~fullscreen"
+    super + shift + f
+        bspc node -t "~floating"
+  '';
+
+  home.activation.reloadSxhkd = lib.hm.dag.entryAfter [ "linkGeneration" ] ''
+    ${pkgs.procps}/bin/pkill -USR1 -x sxhkd || true
+  '';
+}