Feat: payment component

[rolznz]

Fixes #62

Testable at https://bitcoin-connect-request-payment-modal--rolznz.repl.co/ (desktop and mobile - unfortunately on mobile replit keeps refreshing the page so Alby NWC does not work)

• Add payment page
• programmatically pass the invoice to launchModal (address Move launchModal to root package #63)
• Extract amount from invoice to display using lightning tools
• Fix: GetBalance is called even though your balance isn't shown in the request payment screen
• Fix header not showing on payment request screen
• Copy invoice to clipboard - Icon and animation
• Open invoice in wallet button
• Use a proper QR library rather than QR API
• Handle QR code in dark mode (for now it looks ugly but it works)
• Add support in React wrapper
• Automatically closing the modal after the success animation
• Mobile styles
• embed the success gif in bitcoin connect (not host it externally)

[reneaaron]

tACK