Add local ADB web remote for Android TV

Node/Express server shells out to adb (connect/pair/keyevent/text/app
launch) and serves a mobile-first installable PWA remote: power, mute,
input switch, volume/channel rockers, D-pad, media transport, text
entry, and one-tap streaming app launch. Supports multiple saved TVs
and the Android 11+ wireless-debugging pairing flow.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RSVyYcrjrbmrMKT85G4fyn

public/manifest.json

@@ -0,0 +1,14 @@
+{
+  "name": "TV Remote",
+  "short_name": "TV Remote",
+  "description": "ADB-powered remote control for Android TV",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#0b0d12",
+  "theme_color": "#0b0d12",
+  "orientation": "portrait",
+  "icons": [
+    { "src": "/icons/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any maskable" },
+    { "src": "/icons/icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable" }
+  ]
+}