Description

I know that's maybe not a very requested feature but because I had a problem with converting my own collection of yomichan formatted dictionaries I wrote an plugin extension.

Questions

• Is there any possible way to properly implement progress bar if dictionary length is unknown until we read it fully?
• Are there any metadata (like plugins-meta/index.json) that also need to be updated?
• I guess code style is differs from original code, isn't it? Any moments that I need to fix?

Limitations

Supports only dictionaries of 3 version and don't implement any interactions with tags or kanji banks.

I haven't found a contribution guideline so if I have missed anything, please let me know.

Closes #622.