feat: implement comprehensive process cleanup system

- Added aggressive cleanup system that runs every 5 minutes to kill orphaned processes
- Enhanced process cleanup with better signal handling and forced cleanup
- Added startup initialization system to ensure cleanup is properly loaded
- Integrated cleanup system into app layouts for automatic initialization
- Added zombie process cleanup and temp directory cleanup
- Improved Docker container restart behavior for proper process cleanup
- Resolves issue with zombie Chrome processes accumulating

app/layout.js

@@ -1,6 +1,9 @@
 import './globals.css'
 import Navigation from '../components/Navigation.tsx'
 
+// Initialize cleanup system
+import '../lib/startup'
+
 export const metadata = {
   title: 'Trading Bot Dashboard',
   description: 'AI-powered trading bot with automated analysis and execution',