Feat: Initialize a Git repository if none exists

[shatrughantwt]

I’d like to add a feature that allows users to initialize a new Git repository
in the current directory if one doesn’t already exist.

Currently, if the directory is not a Git repository, the application fails.
This feature would:

• Check whether a .git directory exists
• If not, initialize a new Git repository automatically
• Improve first-time user experience

If this approach sounds good, I’d be happy to work on this and raise a PR.