feat: interactive Iceberg Mode Explorer with real C++→WASM engine - #404

Changed pages include:

• home.html - view
• index.html - view
• 404.html - view
• agent-handoff-ui-test.html - view
• bloblang-syntax-test.html - view
• cloud-test.html - view
• component-home-test.html - view
• connect-test.html - view
• console-migrator.html - view
• data-platform-test.html - view

There are more changes not included in the list