Add PromptPay (EMV QRCPS) payload generator

[codebude]

Type of issue

• [ ] Request for new feature/improvement

Expected Behavior

Add new payload generator for PromptPay (EMV QRCPS) since it is one of the most used financial QR code types (at least) in Thailand.

Information / Specification

• Information about the release of the standard (english): https://www.nfcworld.com/2017/08/01/354170/emvco-publishes-specification-merchant-presented-qr-code-payments/
• Some background about the standard (thai - use Google translate): https://thestandard.co/standardqrcode/
• The official specification (english - use "merchant" version of the doc): https://www.emvco.com/emv-technologies/qrcodes/
• Quick explanation of the payloads structure (thai - use Google translate): https://www.blognone.com/node/95133

Help wanted?

Currently I'm running out of time. So if you want to implement it and sent a PullRequest, feel free to do so. Otherwise I'll implement it, if I find some spare time. Note: If you want to implement it, please don't just copy and paste a solution from anywhere, but adapt it to the coding style of this project. (Code-/naming style, add code comments, add method descriptors, etc.)