P2TR support#9

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sneurlax wants to merge 3 commits intocypherstack:mainfrom

sneurlax:feat/taproot

Commits on Apr 6, 2026

feat: add taproot (P2TR) support to payment codes and addresses
sneurlax
committed
fix: initialize _paymentCodeString before feature byte methods
sneurlax
committed
test: add taproot feature bit and derived public key tests
sneurlax
committed