fix: remove agent from pnpm workspace to fix Render build

The agent's package.json made it a pnpm workspace member, so
pnpm install on the Node frontend service triggered "uv sync" in an
environment where uv doesn't exist — breaking Render deploys.

Remove apps/agent/package.json entirely (matching the Shadify pattern)
and run the agent dev server via a direct shell command in the root
package.json instead of through Turbo.

Author: GeneralJerel

apps/agent/package.json

@@ -2,9 +2,9 @@
   "name": "copilotkit-langgraph-template",
   "private": true,
   "scripts": {
-    "dev": "turbo run dev",
+    "dev": "concurrently \"turbo run dev\" \"pnpm run dev:agent\" --names turbo,agent --kill-others",
     "dev:app": "turbo run dev --filter='app'",
-    "dev:agent": "turbo run dev --filter='agent'",
+    "dev:agent": "cd apps/agent && uv sync && uv run uvicorn main:app --host 0.0.0.0 --port 8123 --reload",
     "dev:mcp": "turbo run dev --filter='mcp'",
     "build": "turbo run build",
     "lint": "turbo run lint",