[Issue 63]: Conventional Commits

[Seif-Mamdouh]

Description

This PR adds support for conventional commit formatting to the git-ai-commit tool.

The new conventional command allows users to:

• Analyze code changes and automatically suggest the most appropriate commit type (feat, fix, docs, etc.)
• Intelligently recommend a relevant scope based on the affected components
• Format messages according to the conventional commit standard: type(scope): description
• Commit and push changes with the same workflow as the regular command

Changes

• Added a new conventional_commit_handler.py file with the implementation of the conventional commit command
• Updated prompt.py to support a dedicated prompt for conventional commits
• Modified gen_commit_msg.py to pass the conventional parameter to the prompt generator
• Added the new command to main.py with appropriate arguments

Test Plan

run gac conventional or git-ai-commit conventional

W/O optional scope

with the optional scope