refactor(auto-thumbnail): [PKG-AUTO-THUMB-03] type internal extraction contracts

refactor/fixtures/implementation/auto-thumbnail.ts

@@ -0,0 +1,6 @@
+import type Artplayer from 'artplayer'
+import factory from '../../../packages/artplayer-plugin-auto-thumbnail/src'
+
+declare const art: Artplayer
+const registration: Promise<{ name: string }> = factory({ width: 80, number: 5 })(art)
+export { registration }