Add prompt to git init on repo create. Fixes #569

Created by: cvhariharan

Description Adds a prompt to run git init if the directory is not initialized before running glab repo create.

Related Issue Resolves #569 (closed)

How Has This Been Tested?

• Created an empty directory without running git init and running glab repo create directly. -> Prompt for git init shown
• Created an empty directory and ran git init before running glab repo create. -> No prompt shown

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation
• Chore (Related to CI or Packaging to platforms)