LibTextCodec: Add Big5 decoder

Author: https://github.com/skyrising
Commit: 9943bb1d8e
Pull-request: https://github.com/SerenityOS/serenity/pull/24485
Reviewed-by: https://github.com/ADKaster

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

@@ -207,6 +207,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         .gb18030_ranges = data.get("gb18030-ranges"sv)->as_array(),
         .indexes = {
             { "gb18030"sv, move(gb18030_table) },
+            { "big5"sv, prepare_table(data.get("big5"sv)->as_array()) },
         },
     };