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/common/connection.ts

@@ -0,0 +1,9 @@
+export interface SendableConnection {
+	send(data: Buffer | Uint8Array): void;
+}
+
+export interface ReadWriteConnection extends SendableConnection {
+	onMessage(cb: (data: Uint8Array | Buffer) => void): void;
+	onClose(cb: () => void): void;
+	close(): void;
+}

packages/protocol/src/common/util.ts

@@ -0,0 +1,14 @@
+/**
+ * Return true if we're in a browser environment (including web workers).
+ */
+export const isBrowserEnvironment = (): boolean => {
+	return typeof process === "undefined" || typeof process.stdout === "undefined";
+};
+
+/**
+ * Escape a path. This prevents any issues with file names that have quotes,
+ * spaces, braces, etc.
+ */
+export const escapePath = (path: string): string => {
+	return `'${path.replace(/'/g, "'\\''")}'`;
+};