Test sending a payment from a BTC Pay Server store (lightning + on-chain) to through API

[johnsBeharry]

I think these are the relevant API endpoints, payouts should be from the store (in BTC Payer stores are like bank accounts) that the user selects.

Create store on-chain wallet transaction StoreOnChainWallets_CreateOnChainTransaction

https://docs.btcpayserver.org/api/v1/stores/{storeId}/payment-methods/OnChain/{cryptoCode}/wallet/transactions

Pay Lightning Invoice StoreLightningNodeApi_PayInvoice

https://docs.btcpayserver.org/api/v1/stores/{storeId}/lightning/{cryptoCode}/invoices/pay

[jonathanpalma]

@all-contributors please add @johnsBeharry for project management and ideas

[allcontributors]

@jonathanpalma

I've put up a pull request to add @johnsBeharry! 🎉