Add the support for git svn

[TimeInDreams]

In some working environments, SVN is used to manage the code at the same time. The remote server is SVN, and I want to use git for local management. After obtaining the data of the SVN server through the git svn [svn server path url] -r HEAD command, it cannot be used in the source control and plug-in of vscode. After reading the origin, git remote -v returns no information. I hope this functional interface can be added to avoid using the command line git svn rebase + git svn dcommit during each synchronization. I hope to add support for this function.