feat(gitclone): add wiki repo clone support for git clone command

Add wiki repo clone support for the git clone command of VS Code.

If the GitLab project has the wiki enabled this impl. will show the wiki url (ssh and http) next to the normal repo url.

Impl. notes

@viktomas

• I've added the extra url to the project urls itself
  But this could be also visible as an extra project maybe with Wiki suffix
• I've patch the http/ssh url with a simple string replace
  Could not find a GraphQL export of the wiki url

Relates to #413 (closed)

/cc @phikai