refactor: organize sources by language directories

dart/manga/multisrc/mangabox/src/en/mangabat/mangabat.dart

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+import '../../../../../../../model/source.dart';
+
+Source get mangabatSource => _mangabatSource;
+
+Source _mangabatSource = Source(
+  name: "Mangabat",
+  baseUrl: "https://www.mangabats.com",
+  lang: "en",
+  typeSource: "mangabox",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/mangabox/src/en/mangabat/icon.png",
+  dateFormat: "MMM dd,yy",
+  dateFormatLocale: "en",
+);

dart/manga/multisrc/mangabox/src/en/mangakakalot/mangakakalot.dart

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+import '../../../../../../../model/source.dart';
+
+Source get mangakakalotSource => _mangakakalotSource;
+
+Source _mangakakalotSource = Source(
+  name: "Mangakakalot",
+  baseUrl: "https://www.mangakakalot.gg",
+  lang: "en",
+  typeSource: "mangabox",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/mangabox/src/en/mangakakalot/icon.png",
+  dateFormat: "MMM dd,yyyy",
+  dateFormatLocale: "en",
+);

dart/manga/multisrc/mangabox/src/en/manganato/manganato.dart

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+import '../../../../../../../model/source.dart';
+
+Source get manganatoSource => _manganatoSource;
+
+Source _manganatoSource = Source(
+  name: "Manganato",
+  baseUrl: "https://www.natomanga.com",
+  lang: "en",
+  typeSource: "mangabox",
+  iconUrl:
+      "https://raw.githubusercontent.com/kodjodevf/mangayomi-extensions/$branchName/dart/manga/multisrc/mangabox/src/en/manganato/icon.png",
+  dateFormat: "MMM dd,yy",
+  dateFormatLocale: "en",
+);