Feat incremental

[renan-alm]

This pull request introduces significant improvements and refactoring to the Gerrit synchronization logic and branch utilities. The changes enhance branch and tag syncing reliability, improve error handling, and reduce code duplication by centralizing shared logic. The most important changes are grouped below by theme.

Branch Utilities and Constants

• Added a new branch-utils.js module to centralize shared branch operations such as listing source/destination branches and selecting fallback branches, reducing duplication across the codebase.
• Created a new constants.js module to store configuration values, magic strings, error/info/debug messages, and patterns for Gerrit detection, improving maintainability and clarity.

Gerrit Branch Sync Logic

• Refactored Gerrit branch sync to check for destination branch modifications and whether the source is ahead before pushing, preventing accidental overwrites and ensuring safe pushes. Force-push is now only used when necessary (e.g., new branches or no common history). [1] [2] [3] [4]
• Improved multi-branch sync by mapping source branches to destination branches and handling branch renames or new branches gracefully. The sync now fails fast if any branch cannot be synced, ensuring consistency.

Tag Sync Reliability

• Updated tag syncing to attempt a standard push first and only retry with force if a conflict occurs, minimizing unnecessary force pushes and improving safety. Per-tag sync also retries with force only on failure. [1] [2]