feat: Add PostgreSQL and Redis client support

- 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.

docs/rhai/index.md

@@ -17,6 +17,8 @@ SAL exposes the following modules to Rhai scripts:
 - Buildah Module: Container image building
 - Nerdctl Module: Container runtime operations
 - RFS Module: Remote file system operations
+- Redis Client Module: Redis database connection and operations
+- PostgreSQL Client Module: PostgreSQL database connection and operations
 
 ## Running Rhai Scripts
 
@@ -34,6 +36,7 @@ SAL includes test scripts for verifying the functionality of its Rhai integratio
 - [Git Module Tests](git_module_tests.md): Tests for Git repository management and operations
 - [Process Module Tests](process_module_tests.md): Tests for command execution and process management
 - [Redis Client Module Tests](redisclient_module_tests.md): Tests for Redis connection and operations
+- [PostgreSQL Client Module Tests](postgresclient_module_tests.md): Tests for PostgreSQL connection and operations
 - [Text Module Tests](text_module_tests.md): Tests for text manipulation, normalization, replacement, and template rendering
 - [Buildah Module Tests](buildah_module_tests.md): Tests for container and image operations
 - [Nerdctl Module Tests](nerdctl_module_tests.md): Tests for container and image operations using nerdctl