refactor git clone

[larshp]

so it works on github.dev

and doesnt show the annoying popups

[larshp]

https://stackoverflow.com/questions/46511595/how-to-access-the-api-for-git-in-visual-studio-code

https://github.com/microsoft/vscode/issues/174886

https://github.com/microsoft/vscode/tree/main/extensions/git

RemoteSourceProvider

https://github.com/microsoft/vscode/issues/145776

or use child_process.spawn like the git extension, will get rid of the popups? but not work on github.dev