Web.CommonAPI: Add local-only posts

A post is local-only when it contains a ️ (👁️) at the end. This is from glitch-soc

lib/pleroma/web/common_api/common_api.ex

@@ -124,14 +124,16 @@ defmodule Pleroma.Web.CommonAPI do
              |> Enum.reduce(%{}, fn {name, file}, acc ->
                Map.put(acc, name, "#{Pleroma.Web.Endpoint.static_url()}#{file}")
              end)
-           ) do
+           ),
+         local_only <- !!(String.last(status) == "👁️") do
       res =
         ActivityPub.create(%{
           to: to,
           actor: user,
           context: context,
           object: object,
-          additional: %{"cc" => cc}
+          additional: %{"cc" => cc},
+          local: local_only
         })
 
       res