Refactor monolithic gitHappens.py into modular architecture

[zigcBenx]

Problem

The entire CLI tool is currently contained in a single gitHappens.py file, making it difficult to maintain, test, and extend. This monolithic structure violates separation of concerns and makes the codebase harder to navigate.

Solution

Split the monolithic file into a modular architecture with clear separation of responsibilities.

Proposed Structure

├── main.py                 # Entry point and argument parsing
├── gitlab_api.py           # GitLab API interactions
├── config.py              # Configuration management
├── templates.py           # Template processing
├── git_utils.py           # Git operations
├── interactive.py         # User prompts and CLI interactions
└── commands/
    ├── create_issue.py     # Issue creation logic
    ├── review.py          # Review workflow
    ├── deploy.py          # Deployment checks
    └── open_mr.py         # Merge request operations

Acceptance Criteria

• Extract GitLab API calls into gitlab_api.py
• Move configuration handling to config.py
• Separate template logic into templates.py
• Create command-specific modules in commands/ folder
• Ensure all existing functionality works unchanged
• Add basic unit tests for each module
• Update README with new structure

Benefits

• Improved code maintainability
• Easier testing and debugging
• Better separation of concerns
• Simpler onboarding for contributors

Priority: Medium
Labels: refactoring, technical-debt, enhancement

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