docs: nesting VTU docs under /v2/

Author: JessicaSachs

netlify.toml

@@ -0,0 +1,6 @@
+[[redirects]]
+  from = "/v2/*"
+  to = "https://vue-test-utils-next-docs.netlify.app/:splat"
+  status = 200
+  force = true # COMMENT: ensure that we always redirect
+  headers = {X-From = "Netlify"}