Moved NavPlugin types into seperate file

Summary: Moved Flow types into their own file. I will be adding more types as part of the auto complete for the navigation bar and this is to keep the code more organized.

Reviewed By: danielbuechele

Differential Revision: D16540279

fbshipit-source-id: d69ac0d05f91e9d92fcda37325c791ddc83a52c9

src/plugins/navigation/index.js

@@ -16,25 +16,12 @@ import {
 } from './components';
 import {readBookmarksFromDB, writeBookmarkToDB} from './util/indexedDB';
 
-type State = {|
-  bookmarks: Map<string, Bookmark>,
-  shouldShowSaveBookmarkDialog: boolean,
-  saveBookmarkURI: ?string,
-|};
-
-export type NavigationEvent = {|
-  date: ?Date,
-  uri: ?string,
-|};
-
-export type Bookmark = {|
-  uri: string,
-  commonName: string,
-|};
-
-export type PersistedState = {|
-  navigationEvents: Array<NavigationEvent>,
-|};
+import type {
+  State,
+  PersistedState,
+  Bookmark,
+  NavigationEvent,
+} from './flow-types';
 
 export default class extends FlipperPlugin<State, {}, PersistedState> {
   static title = 'Navigation';