improve collaboration

[azu]

Hi @seikichi

If you are interested in a new collaborator, please add me as a collaborator on GitHub/npm.
I want to help maintain this plugin because I've used it in promises-book.

If you are ok, I transfer this repository to https://github.com/textlint and add new npm authors.
📝 It will require admin/owner permission.

If you have a question, please tell me it, or chatting https://gitter.im/textlint-ja/textlint-ja

Previously, textlint-plugin-latex2e collaborator does same things.
https://gitter.im/textlint-ja/textlint-ja?at=5e66099995b8ff0bbfa36d5e

[azu]

📝 I'll create more detailed guideline for transferring

[azu]

I've created new disussion.
https://github.com/orgs/textlint/discussions/1