Add option to initialize git repository

[ryohidaka]

What:

Added an option to automatically initialize a Git repository and make an initial commit in @bunup/cli create.

Why:

Previously, users had to manually initialize a Git repository after project creation, which was inconvenient and time-consuming.

How:

An optional flag was added to initialize a Git repository.
If enabled, the following commands are executed automatically after the project is created:

git init
git add -A
git commit -m "Initial commit from Bunup"

Checklist:

• Documentation
• Tests
• Ready to be merged
  

Thanks for maintaining such an awesome tool!