fix: replace @agentclientprotocol/sdk with readline-based JSON-RPC

The official TS SDK's ndJsonStream hangs indefinitely on prompt()
for sessions with 20+ messages (solve-issue planner). Root cause
appears to be a stream backpressure issue in the SDK's ReadableStream
adapter.

Switch back to readline-based line parsing which reliably receives
all JSON-RPC responses. Also handle session/request_permission
inline (auto-approve, yolo mode equivalent).

Ref #398

packages/workflow-agent-hermes/package.json

@@ -21,7 +21,6 @@
     "test": "bun test"
   },
   "dependencies": {
-    "@agentclientprotocol/sdk": "^0.22.1",
     "@uncaged/json-cas": "^0.4.0",
     "@uncaged/workflow-agent-kit": "workspace:^"
   },