feat: add post-rollback hook mechanism

[rankaiyx]

feat: add post-rollback hook mechanism

• Implement run_hooks() function to execute post-rollback commands
• Support multiple commands from config's [hooks] section
• Handle dry-run mode for hook commands
• Execute hooks after successful rollback
• Maintain original error handling and rollback safety
• Ignore empty lines and comments in hook commands
• Log command execution with exit status reporting
• Follow the principle of minimal modification.

[rankaiyx]

I thought about it and realized that there is really no need to integrate a special cleaning function, as it is not part of the program's job. Perhaps adding a hook function would be a better choice.
How does that sound?