Add back more functions from Sway into Niri, add a standard naming scheme

modules/home/wms/niri/programs/sleep-niri/default.nix

@@ -0,0 +1,10 @@
+{ pkgs, config, ... }: 
+{
+  home.packages = with pkgs; [
+    (pkgs.writeScriptBin "sleep-niri" ''
+      swaylock & ${pkgs.swayidle}/bin/swayidle -w \
+        timeout 1 'niri msg action power-off-monitors' \
+        resume 'niri msg action power-on-monitors; pkill -9 swayidle'
+    '')
+  ];
+}