インスタンス運営者がピン留めユーザーを設定できるように

Related #4892

src/client/app/common/views/pages/explore.vue

@@ -26,6 +26,9 @@
 	</mk-user-list>
 
 	<template v-if="tag == null">
+		<mk-user-list :make-promise="pinnedUsers">
+			<fa :icon="faBookmark" fixed-width/>{{ $t('pinned-users') }}
+		</mk-user-list>
 		<mk-user-list :make-promise="popularUsers">
 			<fa :icon="faChartLine" fixed-width/>{{ $t('popular-users') }}
 		</mk-user-list>
@@ -57,6 +60,7 @@ export default Vue.extend({
 
 	data() {
 		return {
+			pinnedUsers: () => this.$root.api('pinned-users'),
 			popularUsers: () => this.$root.api('users', {
 				state: 'alive',
 				origin: 'local',