Add Support for Cassandra DB

[bhaskarblur]

Extend NeoBase to support Apache Cassandra, enabling users to query and manage distributed, high-availability databases.

Requirements:

• Implement CQL query generation based on user prompts.
• Enable schema discovery for tables, columns, and data types.
• Handle efficient pagination using token-based methods (no LIMIT OFFSET).
• Use gocql driver for query execution and connection handling.
• Ensure safe, optimized query execution while respecting Cassandra’s distributed architecture.
• Support batch operations and secondary indexes where applicable.
• Maintain consistency with existing database integrations in NeoBase.