feat(git): add ls alias for listing all branches

[dgokcin]

Summary

Add a new git alias ls that shows all branches (both local and remote) using git branch -a. This provides a quick and intuitive way to view all available branches.

Changes

• Added new git alias ls that maps to git branch -a
• The alias provides a shorter, more memorable command for listing branches
• Shows both local and remote branches in one view

Additional Notes

• The alias follows the common Unix/Linux convention where ls is used to list items
• This complements existing branch-related aliases in the configuration
• The command is simple and straightforward, making it easy to remember and use