Add frontend speed test application and server setup

* Introduced a new HTML frontend for network speed testing with a responsive UI
* Implemented backend server functionality to serve the frontend and handle speed test APIs
* Added speed test logic for downloading and uploading data, including progress tracking and result validation
* Created README-SPEEDTEST.md for documentation on application architecture, setup, and usage.
* Updated package.json to include necessary scripts and dependencies for development and testing

package.json

@@ -9,7 +9,9 @@
     "lint": "eslint --max-warnings 0 './src'",
     "prelint:fix": "bun run format",
     "lint:fix": "eslint --fix './src'",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsc --noEmit",
+    "start": "bun run src/index.ts",
+    "dev": "bun run start"
   },
   "devDependencies": {
     "@eslint/css": "0.14.1",
@@ -24,6 +26,7 @@
     "typescript-eslint": "8.47.0"
   },
   "dependencies": {
-    "@techniker-me/logger": "0.0.15"
+    "@techniker-me/logger": "0.0.15",
+    "concurrently": "9.2.1"
   }
 }