Add support for JMdict data

[parfait8566]

Is it possible to supplement the full dict with JMdict data? It'd be quite useful and it's free to use

[katsutan]

Since there is no word cost and edge cost, it is necessary to use it from such as SudachiDict.
JMDict and SudachiDict have different part-of-speech formats, so it takes time to alignment them. Therefore, we cannot support it for the time being.
Pull requests are welcome.