fix(docs): update package description and keywords

Author: yeshamavani

package.json

@@ -2,10 +2,13 @@
   "name": "loopback4-mcp",
   "version": "0.0.2",
   "private": false,
-  "description": "Desktop",
+  "description": "A loopback extension that exposes API to MCP Tools.",
   "keywords": [
     "loopback-extension",
-    "loopback"
+    "loopback",
+    "loopback4",
+    "mcp",
+    "mcp-tool"
   ],
   "main": "dist/index.js",
   "types": "dist/index.d.ts",