test(refactor): [BASE-HARNESS-01] add isolated published API fixture

refactor/fixtures/api.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+<meta charset="utf-8">
+<title>ArtPlayer published API baseline</title>
+<style>.player { width: 640px; height: 360px; } pre { white-space: pre-wrap; }</style>
+<h1>Published API contract</h1>
+<p id="status">Capturing...</p>
+<div class="player"></div>
+<pre id="result"></pre>
+<script src="/releases/artplayer/dist/artplayer.js"></script>
+<script src="/releases/artplayer-plugin-chapter/dist/artplayer-plugin-chapter.js"></script>
+<script src="/fixtures/api.js"></script>
+</html>