feat: initial commit — GramJS Telegram relay for OpenClaw inject

Telegram userbot relay that monitors specified group chats and forwards
bot messages to OpenClaw's inject-http endpoint via webhook.

Features:
- GramJS (MTProto) for reading bot messages (invisible to Bot API)
- Media download + multipart form upload
- BOT_EXCLUDE filter (by user ID or @username)
- HTML entity formatting (bold, italic, code, pre, links, etc.)
- Graceful shutdown on SIGINT/SIGTERM
- .env configuration with validation

package.json

@@ -0,0 +1,13 @@
+{
+  "name": "intergram-js",
+  "version": "1.0.0",
+  "type": "module",
+  "main": "main.js",
+  "scripts": {
+    "start": "node main.js"
+  },
+  "dependencies": {
+    "telegram": "^2.26.22",
+    "input": "^1.0.1"
+  }
+}