Refactor main process modules into multiple files

src/account_x.test.ts

@@ -9,7 +9,7 @@ import {
     XAPILegacyTweet,
     XAPIConversation,
     XAPIUser
-} from './account_x_types';
+} from './account_x';
 import {
     XTweetRow,
     XUserRow,

src/account_x/index.ts

@@ -0,0 +1,3 @@
+export * from './types';
+export * from './x_account_controller';
+export * from './ipc';