Improve git handling from code-server

• Password Caching: When using git from code-server, the user is asked for credentials each time. Caching does not work out of the box. VS Code suggests to set up a credential helper. But does it work in code-server? In GitHub 2FA is required, which would open a browser window, which might not be possible in code-server. For gitlab it might not ask in via the UI and just deny access until a git fetch (or similar) is executed from command line.