refactor: organize sources by language directories

dart/manga/multisrc/mangareader/src/fr/flamescansfr/flamescansfr.dart

@@ -0,0 +1,14 @@
+import '../../../../../../../model/source.dart';
+
+Source get flamescansfrSource => _flamescansfrSource;
+Source _flamescansfrSource = Source(
+  name: "Legacy Scans",
+  baseUrl: "https://legacy-scans.com",
+  lang: "fr",
+  isNsfw: false,
+  typeSource: "mangareader",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/mangareader/src/fr/flamescansfr/icon.png",
+  dateFormat: "MMMM d, yyyy",
+  dateFormatLocale: "fr",
+);