refactor(contracts): remove deprecated AIPowerRental contract in favor of bounty system

- Delete AIPowerRental.sol (566 lines) - replaced by AgentBounty.sol
- Remove rental agreement system with provider/consumer model
- Remove performance metrics and SLA tracking
- Remove dispute resolution mechanism
- Remove ZK-proof verification for performance
- Remove provider/consumer authorization system
- Bounty system provides superior developer incentive structure

apps/marketplace-web/src/main.tsx

@@ -0,0 +1,10 @@
+import React from 'react'
+import ReactDOM from 'react-dom/client'
+import App from './App'
+import './index.css'
+
+ReactDOM.createRoot(document.getElementById('app')!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+)