UX: adds chat section in settings and hide it in plugins (#18984)

app/assets/javascripts/admin/addon/templates/plugins-index.hbs

@@ -13,7 +13,7 @@
     </thead>
     <tbody>
       {{#each this.model as |plugin|}}
-        <tr>
+        <tr data-plugin-name={{plugin.name}}>
           <td>
             {{#if plugin.is_official}}
               {{d-icon "check-circle"

plugins/chat/assets/stylesheets/common/core-extensions.scss

@@ -4,3 +4,9 @@
     display: none;
   }
 }
+
+.admin-plugins {
+  [data-plugin-name="chat"] {
+    display: none;
+  }
+}

plugins/chat/config/locales/client.en.yml

@@ -1,6 +1,9 @@
 en:
   js:
     admin:
+      site_settings:
+        categories:
+          chat: Chat
       logs:
         staff_actions:
           actions:

plugins/chat/config/settings.yml

@@ -1,4 +1,4 @@
-plugins:
+chat:
   chat_enabled:
     default: false
     client: true