feat: Fabric channel plugin for OpenClaw (Phase 1, B1)

OpenClaw channel plugin: defineChannelPluginEntry + createChatChannelPlugin.
Inbound via channel-turn kernel (wakeup -> admission: true=dispatch,
else drop+recordHistory). One Fabric socket per agent identity in the
plugin runtime (no sidecar). Center API-key agent auth. Tools:
fabric-register, create-{chat,work,report,discussion}-channel,
discussion-complete (post summary + close channel).

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

package.json

@@ -0,0 +1,22 @@
+{
+  "name": "fabric-openclaw-plugin",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "description": "Fabric channel plugin for OpenClaw",
+  "openclaw": {
+    "extensions": ["./index.ts"],
+    "setupEntry": "./src/setup-entry.ts",
+    "channel": {
+      "id": "fabric",
+      "label": "Fabric",
+      "blurb": "Connect OpenClaw agents to a Fabric guild."
+    }
+  },
+  "dependencies": {
+    "socket.io-client": "^4.8.3"
+  },
+  "scripts": {
+    "build": "tsc -p tsconfig.json"
+  }
+}