Implement reliability infrastructure in setup script

- Added cleanup and resource tracking mechanisms to ensure safe script termination.
- Introduced state management for rollback and resume capabilities, allowing users to continue interrupted setups.
- Implemented signal handling for graceful cleanup on script interruption.
- Enhanced command execution with atomic file operations and verification for safer configuration updates.
- Added support for sudo keep-alive to manage credentials more securely during execution.
- Included checks to prevent redundant operations and maintain a clear setup state.

Author: Firstp1ck