Move DataInspector to flipper-plugin

Summary:
This diff moves the rest of the DataInspector jungle to flipper-plugin. No actual improvements are made yet, but the code is decoupled from Electron and the legacy theming. For example by using Antd based context menus.

Note that `ManagedDataInspector` is now rebranded `DataInspector`, as that is the only variation that should (and is) used publicly.

For the interactionTracker removal, see next diff.

SearchableDataInspector will be addressed in a next diff

Reviewed By: passy

Differential Revision: D27603125

fbshipit-source-id: 188bd000260e4e4704202ce02c7fc98319f0bc22

desktop/flipper-plugin/src/ui/Highlight.tsx

@@ -17,10 +17,9 @@ import React, {
   useContext,
 } from 'react';
 import {debounce} from 'lodash';
-import {theme} from './theme';
 
 const Highlighted = styled.span({
-  backgroundColor: theme.textColorActive,
+  backgroundColor: '#fcd872',
 });
 
 export interface HighlightManager {