Add trends UI with admin and user settings (#11502)

config/locales/en.yml

@@ -460,8 +460,8 @@ en:
         title: Custom terms of service
       site_title: Server name
       spam_check_enabled:
-        desc_html: Mastodon can auto-silence and auto-report accounts based on measures such as detecting accounts who send repeated unsolicited messages. There may be false positives.
-        title: Anti-spam
+        desc_html: Mastodon can auto-silence and auto-report accounts that send repeated unsolicited messages. There may be false positives.
+        title: Anti-spam automation
       thumbnail:
         desc_html: Used for previews via OpenGraph and API. 1200x630px recommended
         title: Server thumbnail
@@ -469,6 +469,9 @@ en:
         desc_html: Display public timeline on landing page
         title: Timeline preview
       title: Site settings
+      trends:
+        desc_html: Publicly display previously reviewed hashtags that are currently trending
+        title: Trending hashtags
     statuses:
       back_to_account: Back to account page
       batch:
@@ -514,6 +517,7 @@ en:
     advanced_web_interface_hint: 'If you want to make use of your entire screen width, the advanced web interface allows you to configure many different columns to see as much information at the same time as you want: Home, notifications, federated timeline, any number of lists and hashtags.'
     animations_and_accessibility: Animations and accessibility
     confirmation_dialogs: Confirmation dialogs
+    discovery: Discovery
     sensitive_content: Sensitive content
   application_mailer:
     notification_preferences: Change e-mail preferences

config/locales/simple_form.en.yml

@@ -114,6 +114,7 @@ en:
         setting_show_application: Disclose application used to send toots
         setting_system_font_ui: Use system's default font
         setting_theme: Site theme
+        setting_trends: Show today's trends
         setting_unfollow_modal: Show confirmation dialog before unfollowing someone
         setting_use_blurhash: Show colorful gradients for hidden media
         setting_use_pending_items: Slow mode

config/settings.yml

@@ -34,6 +34,7 @@ defaults: &defaults
   advanced_layout: false
   use_blurhash: true
   use_pending_items: false
+  trends: true
   notification_emails:
     follow: false
     reblog: false