ScribeLogger moved to common

Summary: There's nothing specific nor private about the ScribeLogger, so it is moved to flipper-common.

Reviewed By: LukeDefeo

Differential Revision: D48556074

fbshipit-source-id: aa9446036fd07fe6e6debc5a978a42308fc93fe0

desktop/flipper-common/src/index.tsx

@@ -21,6 +21,7 @@ export {
   NoopLogger,
 } from './utils/Logger';
 export * from './utils/LoggerTailer';
+export * from './utils/ScribeLogger';
 export * from './server-types';
 export * from './companion-types';
 export * from './ServerAddOn';