refactor: organize sources by language directories

dart/manga/multisrc/mangareader/src/tr/athenamanga/athenamanga.dart

@@ -0,0 +1,14 @@
+import '../../../../../../../model/source.dart';
+
+Source get athenamangaSource => _athenamangaSource;
+Source _athenamangaSource = Source(
+  name: "Athena Manga",
+  baseUrl: "https://athenamanga.com",
+  lang: "tr",
+  isNsfw: false,
+  typeSource: "mangareader",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/mangareader/src/tr/athenamanga/icon.png",
+  dateFormat: "MMMM d, yyy",
+  dateFormatLocale: "tr",
+);