Add CoinAPI for libPiggyEconomy

[ClickedTran]

• Add new provider, that is CoinAPI, I see many people are quite disappointed when my plugin uses libPiggyEconomy because it does not support CoinAPI, and most people see CoinAPI as a plugin that helps them make money by recharging the server.
• Please accept this pull request

Thank Author and Development Team for reading and accept

Written by: ClickedTran
Once again thank you all

[Aericio]

Where is the repository for CoinAPI?

[ClickedTran]

Kho lưu trữ của CoinAPI ở đâu?

I'm not sure, CoinAPI is a remade plugin based on EconomyAPI, but I see a lot of people are interested in it, you can see it here: https://youtu.be/qDn9Ca72-Zk?si=mhhb8PIaPZktwZip

[Aericio]

Unfortunately, since the code isn't available on GitHub nor Poggit, I won't be accepting this PR for safety reasons. I don't want to bring exposure to a potentially unsafe plugin.

You can ask the maintainer of CoinAPI to upload their code on GitHub/Poggit, then we can take a look at adding support again.

Thank you for your contribution, though.