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/ui/components/Radio.tsx

@@ -0,0 +1,48 @@
+/**
+ * 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 {PureComponent} from 'react';
+import styled from '@emotion/styled';
+import React from 'react';
+
+type RadioProps = {
+  /** Whether the radio button is checked. */
+  checked: boolean;
+  /** Called when a state change is triggered */
+  onChange: (selected: boolean) => void;
+  disabled?: boolean;
+};
+
+const RadioboxContainer = styled.input({
+  display: 'inline-block',
+  marginRight: 5,
+  verticalAlign: 'middle',
+});
+RadioboxContainer.displayName = 'Radiobox:RadioboxContainer';
+
+/**
+ * A radio button to toggle UI state
+ * @deprecated use Radio from 'antd'
+ */
+export default class Radio extends PureComponent<RadioProps> {
+  onChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    this.props.onChange(e.target.checked);
+  };
+
+  render() {
+    return (
+      <RadioboxContainer
+        type="radio"
+        checked={this.props.checked}
+        onChange={this.onChange}
+        disabled={this.props.disabled}
+      />
+    );
+  }
+}