Move desktop-related code to "desktop" subfolder (#872)

Summary:
Pull Request resolved: https://github.com/facebook/flipper/pull/872
Move all the JS code related to desktop app to "desktop" subfolder.

The structure of "desktop" folder:
- `src` - JS code of Flipper desktop app executing in Electron Renderer (Chrome) process. This folder also contains all the Flipper plugins in subfolder "src/plugins".
- `static` - JS code of Flipper desktop app bootstrapping executing in Electron Main (Node.js) process
- `pkg` - Flipper packaging lib and CLI tool
- `doctor` - Flipper diagnostics lib and CLI tool
- `scripts` - Build scripts for Flipper desktop app
- `headless` - Headless version of Flipper app
- `headless-tests` - Integration tests running agains Flipper headless version

Reviewed By: passy

Differential Revision: D20249304

fbshipit-source-id: 9a51c63b51b92b758a02fc8ebf7d3d116770efe9

desktop/types/adbkit.d.tsx

@@ -0,0 +1,75 @@
+/**
+ * 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
+ */
+
+interface Device {
+  id: string;
+  type: 'emulator' | 'device' | 'offline';
+}
+
+interface Util {
+  readAll: (stream: NodeJS.ReadStream) => Promise<Buffer>;
+}
+
+// https://github.com/openstf/adbkit#pulltransfer
+interface PullTransfer extends NodeJS.WriteStream {
+  cancel: () => this;
+  on(
+    event: 'progress',
+    listener: (stats: {bytesTransferred: number}) => void,
+  ): this;
+  on(event: 'error', listener: (err: Error) => void): this;
+  on(event: 'end', listener: () => void): this;
+  on(event: 'resize', listener: () => void): this;
+}
+
+interface DeviceTracker extends NodeJS.EventEmitter {
+  on(event: 'add', listener: (device: Device) => void): this;
+  on(event: 'remove', listener: (device: Device) => void): this;
+  on(event: 'change', listener: (device: Device) => void): this;
+  on(
+    event: 'changeSet',
+    listener: (changes: {
+      added: Device[];
+      removed: Device[];
+      changed: Device[];
+    }) => void,
+  ): this;
+  on(event: 'error', listener: (err: Error) => void): this;
+  on(event: 'end', listener: () => void): this;
+}
+
+declare module 'adbkit' {
+  const util: Util;
+  const adbkit: any;
+  export interface Client {
+    listDevices: () => Promise<Device[]>;
+    reverse: (
+      serial: string,
+      remote: string,
+      local: string,
+    ) => Promise<boolean>;
+    shell: (
+      serial: string,
+      command: string | string[],
+    ) => Promise<NodeJS.ReadStream>;
+    screencap: (serial: string) => Promise<NodeJS.WriteStream>;
+    pull: (serial: string, path: string) => Promise<PullTransfer>;
+    openLogcat: (
+      serial: string,
+      options?: {
+        clear?: boolean;
+      },
+      callback?: any,
+    ) => Promise<import('adbkit-logcat').Reader>;
+    getProperties: (serial: string) => Promise<{[key: string]: string}>;
+    trackDevices: () => Promise<DeviceTracker>;
+    kill: () => Promise<boolean>;
+  }
+  export function createClient(config: {port: number; host: string}): Client;
+}