refactor: organize sources by language directories

dart/manga/multisrc/nepnep/src/en/mangalife/mangalife.dart

@@ -0,0 +1,14 @@
+import '../../../../../../../model/source.dart';
+
+Source get mangalifeSource => _mangalifeSource;
+
+Source _mangalifeSource = Source(
+  name: "MangaLife",
+  baseUrl: "https://manga4life.com",
+  lang: "en",
+  typeSource: "nepnep",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/nepnep/src/en/mangalife/icon.png",
+  dateFormat: "yyyy-MM-dd HH:mm:ss",
+  dateFormatLocale: "en",
+);

dart/manga/multisrc/nepnep/src/en/mangasee/mangasee.dart

@@ -0,0 +1,14 @@
+import '../../../../../../../model/source.dart';
+
+Source get mangaseeSource => _mangaseeSource;
+
+Source _mangaseeSource = Source(
+  name: "MangaSee",
+  baseUrl: "https://mangasee123.com",
+  lang: "en",
+  typeSource: "nepnep",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/nepnep/src/en/mangasee/icon.png",
+  dateFormat: "yyyy-MM-dd HH:mm:ss",
+  dateFormatLocale: "en",
+);