fix(lib/discord): expose AppStartPerformance to plugins under discord/common

lib/discord/src/common/index.ts

@@ -11,3 +11,5 @@ export const Logger = lookupModule(byName<DiscordModules.Logger>('Logger'))!
 // ../discord_common/js/packages/tokens/native.tsx
 export const tokensModuleId = lookupModuleId(byProps('RawColor'))!
 export const tokens = __r(tokensModuleId)
+
+export { AppStartPerformance } from '../preinit'

lib/discord/src/index.ts

@@ -1,5 +1,3 @@
-export * from './preinit'
-
 export * as actions from './actions'
 export * as common from './common'
 export * as design from './design'