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/node_modules/.modules.yaml

@@ -0,0 +1,23 @@
+hoistPattern:
+  - '*'
+hoistedDependencies:
+  gnim@1.8.2:
+    gnim: private
+included:
+  dependencies: true
+  devDependencies: true
+  optionalDependencies: true
+injectedDeps: {}
+layoutVersion: 5
+nodeLinker: isolated
+packageManager: pnpm@10.12.1
+pendingBuilds: []
+prunedAt: Tue, 04 Nov 2025 20:28:58 GMT
+publicHoistPattern: []
+registries:
+  '@jsr': https://npm.jsr.io/
+  default: https://registry.npmjs.org/
+skipped: []
+storeDir: /home/zeph/.local/share/pnpm/store/v10
+virtualStoreDir: .pnpm
+virtualStoreDirMaxLength: 120