fix: limit local branch commit range for git hooks

[sujitaw]

What

• modified pre-push script to only check commits related to local branch when pushing a local branch to remote for first time .

Summary by CodeRabbit

• Bug Fixes

  • Warns when a commit message file is missing and exits gracefully
  • Better handling for initial push with improved base-branch detection and safe fallbacks

• Improvements

  • Commit validation messages are colorized for clearer visibility
  • Validates push input and reports the computed commit range before checks
  • Robust temporary-input handling to avoid spurious failures