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/ide/src/fill/fs.ts

@@ -0,0 +1,4 @@
+import { FS } from "@coder/server";
+import { client } from "./client";
+
+export = new FS(client);