Support installation of plugins packaged as vsix

Summary: This is experimental feature to prove that vsix format can be used to publish plugins. Turns out there are almost no differences of vsix in comparison with npm packages.

Reviewed By: jknoxville

Differential Revision: D19770476

fbshipit-source-id: b3c62e7f2a4e8000113b9f1651e8657eb3e0d6fa

types/decompress-unzip.d.tsx

@@ -0,0 +1,12 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+declare module 'decompress-unzip' {
+  export default function(): any;
+}