[FEATURE]: Git GUI for Commit, Staging, and Push Workflow

[trafalgarLaw20]

Feature Request: Git UI for Commit & Push

Add a lightweight Git UI inside OpenCode to handle common actions without using the terminal.

Features:

• view modified/untracked files
• stage/unstage files
• write commit messages
• commit changes
• push to remote

A simple sidebar/panel similar to the VS Code source control workflow would greatly improve the development experience and reduce context switching.

[github-actions]

Thanks for updating the issue! The title and description now look great — concise, clear, and written in your own words. The needs:compliance label has been removed.