refactor(ads): [PKG-ADS-04] reconcile public types and historical imports

test/types/ads-source.ts

@@ -0,0 +1,7 @@
+import type { Factory, RuntimeFactory } from 'artplayer-plugin-ads'
+import factory from '../../packages/artplayer-plugin-ads/src/index'
+
+const compatible: Factory = factory
+const precise: RuntimeFactory = factory
+const acceptsCompatible: typeof factory = compatible
+void [compatible, precise, acceptsCompatible]