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/runner/plugins/websearch.ts

@@ -0,0 +1,27 @@
+import AstalHyprland from "gi://AstalHyprland";
+import { Runner } from "../Runner";
+
+
+const searchEngines = {
+    duckduckgo: "https://duckduckgo.com/?q=",
+    google: "https://google.com/search?q=",
+    yahoo: "https://search.yahoo.com/search?p="
+};
+
+let engine: string = searchEngines.google;
+
+export const PluginWebSearch = {
+    prefix: '?',
+    name: "Web Search",
+    prioritize: true,
+
+    handle: (search) => ({
+        icon: "system-search-symbolic",
+        title: search || "Type your search...",
+        description: `Search the Web`,
+        actionClick: () => AstalHyprland.get_default().dispatch(
+            "exec", 
+            `xdg-open \"${engine + search}\"`
+        )
+    })
+} as Runner.Plugin;