Move app/src (mostly) to flipper-ui-core/src

Summary:
This diff moves all UI code from app/src to app/flipper-ui-core. That is now slightly too much (e.g. node deps are not removed yet), but from here it should be easier to move things out again, as I don't want this diff to be open for too long to avoid too much merge conflicts.

* But at least flipper-ui-core is Electron free :)
* Killed all cross module imports as well, as they where now even more in the way
* Some unit test needed some changes, most not too big (but emotion hashes got renumbered in the snapshots, feel free to ignore that)
* Found some files that were actually meaningless (tsconfig in plugins, WatchTools files, that start generating compile errors, removed those

Follow up work:
* make flipper-ui-core configurable, and wire up flipper-server-core in Electron instead of here
* remove node deps (aigoncharov)
* figure out correct place to load GKs, plugins, make intern requests etc., and move to the correct module
* clean up deps

Reviewed By: aigoncharov

Differential Revision: D32427722

fbshipit-source-id: 14fe92e1ceb15b9dcf7bece367c8ab92df927a70

desktop/flipper-ui-core/src/fb-stubs/user.tsx

@@ -0,0 +1,101 @@
+/**
+ * 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
+ */
+
+import {Atom, createState} from 'flipper-plugin';
+import {User} from '../reducers/user';
+
+export async function getUser(): Promise<User | null> {
+  throw new Error('Feature not implemented');
+}
+
+export async function internGraphPOSTAPIRequest(
+  _endpoint: string,
+  _formFields: {
+    [key: string]: any;
+  } = {},
+  _internGraphUrl?: string,
+): Promise<any> {
+  throw new Error('Feature not implemented');
+}
+
+export async function internGraphGETAPIRequest(
+  _endpoint: string,
+  _params: {
+    [key: string]: any;
+  } = {},
+  _internGraphUrl?: string,
+): Promise<any> {
+  throw new Error('Feature not implemented');
+}
+
+export async function graphQLQuery(_query: string): Promise<any> {
+  throw new Error('Feature not implemented');
+}
+
+export function logoutUser(_persist: boolean = false): Promise<void> {
+  throw new Error('Feature not implemented');
+}
+
+export type DataExportResult = {
+  id: string;
+  os: 'string';
+  deviceType: string;
+  plugins: string[];
+  fileUrl: string;
+  flipperUrl: string;
+};
+
+export type DataExportError = {
+  error: string;
+  error_class: string;
+  stacktrace: string;
+};
+
+export async function shareFlipperData(
+  _trace: string,
+): Promise<DataExportError | DataExportResult> {
+  new Notification('Feature not implemented');
+  throw new Error('Feature not implemented');
+}
+
+export async function writeKeychain(_token: string) {
+  throw new Error('Feature not implemented');
+}
+
+export async function uploadFlipperMedia(
+  _path: string,
+  _kind: 'Image' | 'Video',
+): Promise<string> {
+  throw new Error('Feature not implemented');
+}
+export async function getFlipperMediaCDN(
+  _uploadID: string,
+  _kind: 'Image' | 'Video',
+): Promise<string> {
+  throw new Error('Feature not implemented');
+}
+
+export async function getPreferredEditorUriScheme(): Promise<string> {
+  return 'vscode';
+}
+
+export async function appendAccessTokenToUrl(_url: URL): Promise<string> {
+  throw new Error('Implement appendAccessTokenToUrl');
+}
+
+const isLoggedInAtom = createState(false);
+const isConnectedAtom = createState(true);
+
+export function isLoggedIn(): Atom<boolean> {
+  return isLoggedInAtom;
+}
+
+export function isConnected(): Atom<boolean> {
+  return isConnectedAtom;
+}