fix: production renderer, app icon, dev:web script

- Add Bradly app icon (.icns + .png) for macOS
- Fix Electron production mode: Express serves built renderer files
- Add extraResource for renderer + remotion-bundle in forge.config.ts
- Fix dev:web script to use npx tsx

package.json

@@ -7,7 +7,7 @@
   "main": "out/main/index.js",
   "scripts": {
     "dev": "electron-vite dev",
-    "dev:web": "tsx server.ts",
+    "dev:web": "npx tsx server.ts",
     "build": "electron-vite build",
     "build:web": "vite build && esbuild server.ts --bundle --platform=node --format=cjs --packages=external --sourcemap --outfile=dist/server.cjs",
     "start": "electron-vite preview",