feat: add automatic clipboard copy functionality

[DFanso]

Description

Automatic clipboard copying after generation

Type of Change

• 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 not work as expected)
• Documentation update
• Code refactoring
• Performance improvement
• Other (please describe):

Related Issue

Changes Made

Auto Copy to Clipboard:

• Automatically copies the generated commit message to clipboard
• Success feedback: "📋 Commit message copied to clipboard!"
• Graceful error handling if clipboard access fails
• Users can immediately paste the message using Ctrl+

Testing

• Tested with Gemini API
• Tested with Grok API
• Tested on Windows
• Tested on Linux
• Tested on macOS
• Added/updated tests (if applicable)

Checklist

• My code follows the project's code style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have tested this in a real Git repository
• I have read the CONTRIBUTING.md guidelines

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For Hacktoberfest Participants

• This PR is submitted as part of Hacktoberfest 2025

Thank you for your contribution! 🎉