Support opening current project in Git GUI apps from Codex Desktop

What variant of Codex are you using?

app

What feature would you like to see?

I would like Codex Desktop to support opening the current project/repository path in external Git GUI applications from the existing top-right project menu.

Today this menu already supports opening the current project in tools such as VS Code, Finder, and Terminal. It would be helpful if Codex could also support Git management apps, for example:

• GitHead
• GitHub Desktop
• Fork
• Tower
• SourceTree
• Other Git GUI clients

My specific use case is opening the current Codex project directly in GitHead, so I can quickly inspect branches, commits, diffs, and repository history while working with Codex.

A possible implementation could be:

• Add an “Open in Git app” option to the existing project menu.
• Detect installed Git GUI apps where possible.
• Open the current project/repository root path in the selected Git app.
• Optionally allow users to configure custom external tools.

This is related to #20950, but this request is specifically about opening the current repository path in external Git GUI apps. If the Codex team is already planning built-in Git/repository browsing or plugin-based Git path viewing inside Codex Desktop, that would also be great.

Additional information

_No response_