feat(swdash): Add SW-Dash (Lit-based service worker dashboard), bundle & serve it; improve servertools and static handlers

ts/controllers/controller.builtin.ts

@@ -1,4 +1,5 @@
 import * as plugins from '../plugins.js';
+import * as paths from '../paths.js';
 
 /**
  * Built-in routes controller for TypedServer
@@ -122,4 +123,25 @@ export class BuiltInRoutesController {
       headers: { 'Content-Type': 'text/plain' },
     });
   }
+
+  @plugins.smartserve.Get('/sw-dash/bundle.js')
+  async getSwDashBundle(ctx: plugins.smartserve.IRequestContext): Promise<Response> {
+    try {
+      const bundleContent = (await plugins.fsInstance
+        .file(paths.swdashBundlePath)
+        .encoding('utf8')
+        .read()) as string;
+
+      return new Response(bundleContent, {
+        status: 200,
+        headers: {
+          'Content-Type': 'text/javascript',
+          'Cache-Control': 'no-cache',
+        },
+      });
+    } catch (error) {
+      console.error('Failed to serve sw-dash bundle:', error);
+      return new Response('SW-Dash bundle not found', { status: 404 });
+    }
+  }
 }