build: PaddedCell-style install.mjs + SDK-aligned packaging

install.mjs (--install/--build-only/--uninstall/--openclaw-profile-path),
tsconfig outDir dist/fabric, package.json openclaw file dep + main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -4,9 +4,8 @@
   "private": true,
   "type": "module",
   "description": "Fabric channel plugin for OpenClaw",
+  "main": "index.js",
   "openclaw": {
-    "extensions": ["./index.ts"],
-    "setupEntry": "./src/setup-entry.ts",
     "channel": {
       "id": "fabric",
       "label": "Fabric",
@@ -16,6 +15,11 @@
   "dependencies": {
     "socket.io-client": "^4.8.3"
   },
+  "devDependencies": {
+    "typescript": "^5.7.2",
+    "@types/node": "^22.10.1",
+    "openclaw": "file:/home/hzhang/.nvm/versions/node/v25.8.1/lib/node_modules/openclaw"
+  },
   "scripts": {
     "build": "tsc -p tsconfig.json"
   }