move node types, stub node modules

Summary: This diff stubs all node modules when running in the browser, so that, albeit with a lot of errors and without plugins, the UI loads in a browser. To be continued in the rest of this diff

Reviewed By: antonk52

Differential Revision: D32665705

fbshipit-source-id: 4632e241f59c5b9712a41d01a26878afb01f69b5

desktop/flipper-ui-browser/src/initializeRenderHost.tsx

@@ -8,7 +8,7 @@
  */
 
 import {FlipperServer, FlipperServerConfig} from 'flipper-common';
-import {getRenderHostInstance, RenderHost} from 'flipper-ui-core';
+import {RenderHost} from 'flipper-ui-core';
 
 export function initializeRenderHost(
   flipperServer: FlipperServer,
@@ -63,10 +63,7 @@ export function initializeRenderHost(
     flipperServer,
     async requirePlugin(path) {
       // TODO: use `await import(path)`?
-      const source = await getRenderHostInstance().flipperServer.exec(
-        'plugin-source',
-        path,
-      );
+      const source = await flipperServer.exec('plugin-source', path);
       // eslint-disable-next-line no-eval
       return eval(source);
     },