- Implement connection pooling using `r2d2` and `r2d2_postgres`
- Add connection pool configuration options to `PostgresConfigBuilder`
- Introduce transaction functions with automatic commit/rollback
- Add functions for executing queries using the connection pool
- Add `QueryParams` struct for building parameterized queries
- Add tests for connection pooling and transaction functions
- Add PostgreSQL client functionality for database interactions.
- Add Redis client functionality for cache and data store operations.
- Extend Rhai scripting with PostgreSQL and Redis client modules.
- Add documentation and test cases for both clients.
