- Add VECTOR data type support for AI/ML workloads (VECTOR<type, dimensions>)
- Add Storage-Attached Index (SAI) syntax (CREATE INDEX USING 'sai'/'StorageAttachedIndex')
- Add vector search with ORDER BY ANN OF syntax for similarity searches
- Add enhanced JSON support with DEFAULT UNSET clause
- Add modern CQL functions (now(), currentTimestamp(), fromJson(), toJson(), etc.)
- Add DURATION data type support
- Fix typo: kwDescibe -> kwDescribe
- Add comprehensive test examples for all new features
- Rename test files for clarity (e.g., vectorTable.cql -> createTableVector.cql)

These changes enable Bytebase to parse modern Cassandra 5.0 features including
vector search capabilities, SAI indexes, and enhanced JSON operations.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Resolved conflicts by keeping all new Cassandra 5.0 features:
- VECTOR data type support
- SAI index syntax
- Enhanced JSON operations
- Modern CQL functions
- Fixed kwDescibe typo

All tests passing after merge.