feat(badges): boot auto-award + checkin hook + search history slot

Wire BadgeAutoAward/Badges init, fire aksrt_checkin_done, and optional
search-history mount point on the search widget.

functions.php

@@ -174,6 +174,12 @@ if (class_exists('\AKSRT\User\Restriction')) {
 if (class_exists('\AKSRT\User\Center')) {
     \AKSRT\User\Center::get_instance()->init();
 }
+if (class_exists('\AKSRT\User\Badges')) {
+    \AKSRT\User\Badges::get_instance()->init();
+}
+if (class_exists('\AKSRT\User\BadgeAutoAward')) {
+    \AKSRT\User\BadgeAutoAward::get_instance()->init();
+}
 if (class_exists('\AKSRT\User\Home')) {
     \AKSRT\User\Home::get_instance()->init();
 }