Feature: Plugin system, site search, notifications, webhooks, caching & loading states

- Plugin/module system with registry, hooks for admin nav/permissions/i18n
- Example Games plugin demonstrating the plugin system
- Site-wide search with Cmd+K command palette (cmdk-based)
- Real-time notification system (SSE + Redis pub/sub)
- Extensible webhook system with admin management UI
- Caching strategy: tiered data cache (unstable_cache + Redis)
- Theme import/export as JSON
- Loading states (spinner/skeleton) for all public pages
- Mobile responsive fixes (admin dashboard, guilds page)
- Webhooks admin page under Settings hub

src/lib/plugins/loader.ts

@@ -0,0 +1,8 @@
+import { pluginRegistry } from "./registry";
+import gamesPlugin from "@/plugins/games";
+
+pluginRegistry.register(gamesPlugin);
+
+export function ensurePluginsLoaded(): void {
+	// Plugins loaded at import time
+}