fix(deps): add missing @connectrpc/connect-node for @cursor/sdk

@cursor/sdk@1.0.19 imports @connectrpc/connect-node at runtime
(Http2SessionManager, createNodeHttpClient, compressionGzip) but only
declares @connectrpc/connect and @connectrpc/connect-web in its deps,
causing ERR_MODULE_NOT_FOUND on plugin load.

Add @connectrpc/connect-node@^1.6.1 to dependencies. Pinned to v1 since
the SDK bundles @connectrpc/connect@1.6.1; connect-node v2.x targets the
connect v2.x API. Resolves to 1.7.0.

Author: justin-carper

package-lock.json

@@ -55,6 +55,7 @@
     "prepublishOnly": "npm run typecheck && npm test && npm run build"
   },
   "dependencies": {
+    "@connectrpc/connect-node": "^1.6.1",
     "@cursor/sdk": "^1.0.18",
     "@opencode-ai/plugin": "^1.17.7"
   },