[payment-widget] After request is persisted, Buyer has option on how to receive receipt: Print, Download PDF, Email, Link ("Add Step 9")

[MantisClone]

Motivation

Buyer may want to download a receipt after making a payment.

Definition of Done

• [x] ~Print~ - Removed from scope, just download the PDF to print it.
• [x] Download PDF
• [x] ~Email PDF~ - Removed from scope due to recurring hosting costs
• [x] Link <-- To Request Invoicing perhaps? Or maybe Request Scan? - Conclusion: Request Scan

Design

"Step 9" in the Design Miro