fix: handle erorrs in add_extensions/0 calls

Author: zachdaniel

lib/spark/formatter.ex

@@ -304,8 +304,11 @@ if Code.ensure_loaded?(Sourceror) do
       |> Enum.concat(config[:extensions] || [])
       |> Enum.concat(type.default_extensions() || [])
       |> Enum.flat_map(fn extension ->
-        Code.ensure_compiled!(extension)
-        [extension | extension.add_extensions()]
+        try do
+          [extension | extension.add_extensions()]
+        rescue
+          _ -> [extension]
+        end
       end)
     end