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

Changed pages include:

• home.html - view
• index.html - view
• agent-handoff-ui-test.html - view
• bloblang-syntax-test.html - view
• console-migrator.html - view
• enterprise-macro-test.html - view
• iceberg-explorer-test.html - view
• limited-availability-test.html - view
• link-targets-test.html - view
• mermaid-test.html - view

There are more changes not included in the list