Add Git: Clone Recursively option

This patch adds a new command, Git: Clone Recursively, that adds the
--recursive option to git clone in order to also check out git
submodules.

Bug: 108381

extensions/git/src/protocolHandler.ts

@@ -34,4 +34,4 @@ export class GitProtocolHandler implements UriHandler {
 	dispose(): void {
 		this.disposables = dispose(this.disposables);
 	}
-}
+}