Namespace languages controller to admin

app/views/admin/languages/index.html.erb

@@ -0,0 +1,20 @@
+<h1>Languages</h1>
+
+<table>
+<tr>
+  <td><b>Language</b></td>
+</tr>
+<% @languages.each do |language| %>
+  <tr>
+    <td><%= language.name %></td>
+    <td><%= link_to "Edit", edit_admin_language_path(language) %></td>
+    <td> | </td>
+    <td><%= link_to "Delete", admin_language_path(language), data: { turbo_method: :delete,
+                                                               turbo_confirm: "Are you sure?" } %></td>
+  </tr>
+<% end %>
+</table>
+
+<br/>
+<br/>
+<%= link_to "New Language", new_admin_language_path %>