Complete enhanced code interpreter integration with demo and testing

Co-authored-by: Gerome-Elassaad <186273274+Gerome-Elassaad@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -9,6 +9,11 @@
 # testing
 /coverage
 
+# demo files (temporary for testing)
+/app/demo
+/components/demo-enhanced-interpreter.tsx
+.env.local
+
 # next.js
 /.next/
 /out/