LibTextCodec: Add EUC-JP decoder

Author: https://github.com/skyrising
Commit: 45f0ae52be
Pull-request: https://github.com/SerenityOS/serenity/pull/24485
Reviewed-by: https://github.com/ADKaster

Meta/Lagom/Tools/CodeGenerators/LibTextCodec/GenerateEncodingIndexes.cpp

@@ -208,6 +208,8 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         .indexes = {
             { "gb18030"sv, move(gb18030_table) },
             { "big5"sv, prepare_table(data.get("big5"sv)->as_array()) },
+            { "jis0208"sv, prepare_table(data.get("jis0208"sv)->as_array()) },
+            { "jis0212"sv, prepare_table(data.get("jis0212"sv)->as_array()) },
         },
     };