Change ownership of this repository

[taku-y]

The ownership of this repository will be changed to Laboro.AI, I'm working for. There will be no change on licenses of the crates in this repository.

• [x] Merge current changes on main branch, although not tied with the latest version of the crates
• [x] Transfer the ownership
• [x] Add a note about this change
• [x] Folk the repository after the transfer, because the crates before the version 0.0.5 are pointing to this repository in crates.io