Add -v, --version flag to display program version info

[initialcommit-io]

Hi @paketb0te ,

I tried implementing git-sim -v and git-sim --version options a few weeks ago but had some trouble due to not being super familiar with Pydantic/Typer. I thought this one might be right up your alley to take a crack at 😄

Let me know!

[paketb0te]

@initialcommit-io yeah good idea, let me give it a go!

[initialcommit-io]

@paketb0te Thank you!!! Just tested and works for me 🥳