docs: v0.1.6 — reliable incoming + outgoing payments Changelog entry for v0.1.6 plus updates to the funding-source docs: - incoming invoice status now polls GetUserOperations (latestIncoming InvoiceOperations) instead of GetPaymentState, which only tracks outgoing payments - create_invoice prefers the account path (NewInvoice) when configured - PayInvoice sends the node-required amount field; settled responses with an empty preimage (internal payments) are a success - kind 21000 table row lists GetUserOperations
docs: add Changelog page; fix wiki formatting (DB switch snippet, stale tree/migrations, NIP-44 v1 + kind 21000)
Add extension documentation wiki