New Endpoint: Payment Forwarding for any wallet/address

Crypto APIs allowed payment forwarding feature for HD wallets only, now you can use payment forwarding feature no matter if the wallet is HD or not and no matter if it's generated using Crypto APIs or not.

The new feature is already live for Bitcoin, Bitcoin Cash, Litecoin, Doge and Dash. Example: https://docs.cryptoapis.io/rest-apis/blockchain-as-a-service-apis/btc/index#btc-payment-forwarding-create-payment-endpoint