feat: language-aware sponsor button (KakaoPay KO / GitHub Sponsors EN)

- sponsor.js: detect language via html[lang] / URL path / .en.html suffix
- Korean pages: KakaoPay QR modal (dark brown + yellow)
- English pages: GitHub Sponsors link button (dark + star icon)
- Added sponsor.js to 818 en/ pages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: M1zz

site/en/accessorysetupkit/01-tutorial.html

@@ -515,4 +515,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/activitykit/01-delivery-tracker.html

@@ -365,5 +365,6 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body>
 </html>

site/en/alarmkit/01-tutorial.html

@@ -731,4 +731,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/appintents/01-siri-todo-app.html

@@ -179,4 +179,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/arkit/01-ar-furniture-app.html

@@ -466,4 +466,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/authservices/01-tutorial.html

@@ -357,5 +357,6 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body>
 </html>

site/en/avfoundation/01-tutorial.html

@@ -676,4 +676,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/avkit/01-tutorial.html

@@ -666,4 +666,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/bluetooth/01-ble-device-scanner.html

@@ -565,4 +565,5 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body></html>

site/en/callkit/01-tutorial.html

@@ -605,5 +605,6 @@ <h2 style="font-size:20px;margin-bottom:12px;">📎 Apple Official Resources</h2
   </div>
 </div>
 </article>
+<script src="../../sponsor.js"></script>
 </body>
 </html>