[Task]: git diff analysis

### Description

Implement a module to extract and analyze diffs from new git commits, identifying changed files and lines.

### Acceptance Criteria

- [ ] The system retrieves diffs from the latest git commit accurately.
- [ ] All changed files are correctly identified (added, modified, deleted, renamed).
- [ ] Line-by-line changes within each file are extracted.
- [ ] The module handles binary files appropriately.
- [ ] Unit tests cover various commit scenarios, including multiple file changes and edge cases.

### Notes

We may possibly need to add re-scan stuff to compare hashes of files for changes.