build(types): ENG-04 add strict projects and legacy compiler checks

test/types/public.ts

@@ -0,0 +1,27 @@
+import type { Option } from 'artplayer'
+import Artplayer from 'artplayer'
+import chapter from 'artplayer-plugin-chapter'
+
+const options: Option = {
+  container: '#player',
+  url: 'video.mp4',
+  plugins: [chapter({ chapters: [{ start: 0, end: 5, title: 'First' }] })],
+}
+const art = new Artplayer(options, function (player) {
+  // eslint-disable-next-line ts/no-this-alias -- Assert the public ready callback receiver type.
+  const self: Artplayer = this
+  self.pause()
+  player.seek = 1
+})
+const playback: Promise<void> = art.play()
+const html: string = Artplayer.html
+const plugin = chapter({})(art)
+plugin.update({ chapters: [] })
+art.on('custom', (value: unknown) => value)
+void [playback, html]
+
+// @ts-expect-error A media URL is a string.
+const invalid = new Artplayer({ container: '#player', url: 42 })
+void invalid
+// @ts-expect-error Chapter start times are numeric.
+chapter({ chapters: [{ start: '0', end: 5, title: 'Invalid' }] })