feat: make AGS colorshell configuration fully declarative

- Add complete colorshell v2.0.3 configuration to home/ags-config/
- Disable runner plugin and NightLight tile (incompatible with NixOS)
- Customize SCSS with full opacity (no transparency)
- Add dark pale blue color scheme in home/pywal-colors/
- Configure Papirus-Dark icon theme via home-manager
- Make ~/.config/ags/ immutable and managed by Nix store
- Auto-deploy pywal colors to ~/.cache/wal/colors.json

All AGS configuration is now reproducible and version controlled.

home/ags-config/modules/reload-handler.ts

@@ -0,0 +1,15 @@
+import { uwsmIsActive } from "./apps";
+
+import Gio from "gi://Gio?version=2.0";
+import { Shell } from "../app";
+
+
+export function restartInstance(): void {
+    Gio.Subprocess.new(
+        ( uwsmIsActive ? 
+            [ "uwsm", "app", "--", "colorshell" ]
+         : [ "colorshell" ]), 
+        Gio.SubprocessFlags.STDOUT_PIPE | Gio.SubprocessFlags.STDERR_PIPE
+    );
+    Shell.getDefault().quit();
+}