Show privileges to FE

I added an extra key
We already had is_admin and is_moderator, now we have an extra privileges key

lib/pleroma/user.ex

@@ -371,6 +371,28 @@ defmodule Pleroma.User do
 
   defp privileged_for?(_, _, _), do: false
 
+  @spec privileges(User.t()) :: [atom()]
+  def privileges(%User{local: false}) do
+    []
+  end
+
+  def privileges(%User{is_moderator: false, is_admin: false}) do
+    []
+  end
+
+  def privileges(%User{local: true, is_moderator: true, is_admin: true}) do
+    (Config.get([:instance, :moderator_privileges]) ++ Config.get([:instance, :admin_privileges]))
+    |> Enum.uniq()
+  end
+
+  def privileges(%User{local: true, is_moderator: true, is_admin: false}) do
+    Config.get([:instance, :moderator_privileges])
+  end
+
+  def privileges(%User{local: true, is_moderator: false, is_admin: true}) do
+    Config.get([:instance, :admin_privileges])
+  end
+
   @spec invisible?(User.t()) :: boolean()
   def invisible?(%User{invisible: true}), do: true
   def invisible?(_), do: false

lib/pleroma/web/mastodon_api/views/account_view.ex

@@ -369,19 +369,22 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
   defp maybe_put_chat_token(data, _, _, _), do: data
 
   defp maybe_put_role(data, %User{show_role: true} = user, _) do
-    data
-    |> Kernel.put_in([:pleroma, :is_admin], user.is_admin)
-    |> Kernel.put_in([:pleroma, :is_moderator], user.is_moderator)
+    put_role(data, user)
   end
 
   defp maybe_put_role(data, %User{id: user_id} = user, %User{id: user_id}) do
-    data
-    |> Kernel.put_in([:pleroma, :is_admin], user.is_admin)
-    |> Kernel.put_in([:pleroma, :is_moderator], user.is_moderator)
+    put_role(data, user)
   end
 
   defp maybe_put_role(data, _, _), do: data
 
+  defp put_role(data, user) do
+    data
+    |> Kernel.put_in([:pleroma, :is_admin], user.is_admin)
+    |> Kernel.put_in([:pleroma, :is_moderator], user.is_moderator)
+    |> Kernel.put_in([:pleroma, :privileges], User.privileges(user))
+  end
+
   defp maybe_put_notification_settings(data, %User{id: user_id} = user, %User{id: user_id}) do
     Kernel.put_in(
       data,