add JSONKifuFormat.d.ts
add JSONKifuFormat.d.ts

na2hiro/json-kifu-format,mizunashi-mana/json-kifu-format,mizunashi-mana/json-kifu-format,na2hiro/json-kifu-format,mizunashi-mana/json-kifu-format,na2hiro/json-kifu-format