refactor: consolidate blockchain explorer into single app and update backup ignore patterns

- Remove standalone explorer-web app (README, HTML, package files)
- Add /web endpoint to blockchain-explorer for web interface access
- Update .gitignore to exclude application backup archives (*.tar.gz, *.zip)
- Add backup documentation files to .gitignore (BACKUP_INDEX.md, README.md)
- Consolidate explorer functionality into main blockchain-explorer application

cli/tests/run_level2_tests.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+"""
+Simple test runner for AITBC CLI Level 2 commands
+"""
+
+import sys
+import os
+
+# Add CLI to path
+sys.path.insert(0, '/home/oib/windsurf/aitbc/cli')
+
+def main():
+    """Main test runner"""
+    print("🚀 AITBC CLI Level 2 Commands Test Runner")
+    print("Testing essential subcommands for daily operations")
+    print("=" * 50)
+    
+    try:
+        # Import and run the main test
+        from test_level2_commands import main as test_main
+        success = test_main()
+        
+        if success:
+            print("\n🎉 All Level 2 tests completed successfully!")
+            sys.exit(0)
+        else:
+            print("\n❌ Some Level 2 tests failed!")
+            sys.exit(1)
+            
+    except ImportError as e:
+        print(f"❌ Import error: {e}")
+        print("Make sure you're running from the tests directory")
+        sys.exit(1)
+    except Exception as e:
+        print(f"❌ Unexpected error: {e}")
+        sys.exit(1)
+
+if __name__ == "__main__":
+    main()