Feature/git support

[matt00ff]

Summary

Added a full Git panel to CodeMotion IDE with file status, diff viewer, staging, commits, history, branches, blame, and a visual commit graph.

Changes

• Added backend Git services and IPC handlers
• Added Git UI panel with Changes, History, Branches, and Graph views
• Added file diff viewer and blame overlay
• Added branch, pull/push/fetch, merge/rebase actions
• Added Git status grouping and commit workflow
• Improved localization and sidebar resize behavior

Testing

• Tested Git operations on a regular Git repository
• Verified app startup with npm start -- --d

[cdmtn-dev]

Please rebase your branch on the latest main branch and update the PR.

Right now the branch includes outdated commits and unrelated changes. After rebasing, keep only the changes related to this feature.

Steps:
git fetch origin
git rebase origin/main
git push --force