Implement fs module (#3)

* Implements the fs module

* Add stats object

* Add not implemented to createWriteStream

* Update mkdtemp to use tmp dir

* Unexport Stats

* Add client web socket for commands and restructure

packages/protocol/src/index.ts

@@ -0,0 +1,6 @@
+export * from "./browser/client";
+export * from "./browser/modules/child_process";
+export * from "./browser/modules/fs";
+export * from "./browser/modules/net";
+export * from "./common/connection";
+export * from "./common/util";