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/kill.ts

@@ -0,0 +1,18 @@
+import { execAsync } from "ags/process";
+import { Runner } from "../Runner";
+import { Notifications } from "../../modules/notifications";
+
+export const PluginKill = {
+    prefix: ":k",
+    handle: () => ({
+        title: "Select a client to kill",
+        closeOnClick: true,
+        icon: "window-close-symbolic",
+        actionClick: () => execAsync("hyprctl kill").catch((e) =>
+            Notifications.getDefault().sendNotification({
+                summary: "Couldn't kill client",
+                body: `An error occurred while trying to kill a client! Stderr: ${e}`
+            })
+        )
+    } satisfies Runner.Result)
+} satisfies Runner.Plugin;