Implement Readable for Offer and Refund#2965

TheBlueMatt merged 2 commits intolightningdevkit:mainlightningdevkit/rust-lightning:mainfrom

tnull:2024-03-impl-readable-writeable-offer-invoice-refundtnull/rust-lightning:2024-03-impl-readable-writeable-offer-invoice-refundCopy head branch name to clipboard