Task 59746573480

refactor, key: move `CreateMuSig2{Nonce,PartialSig}` functions to `musig.{h,cpp}` module

2026-01-07 23:45:43 completed 202601-move-musig-funcs-to-module bb3e26c2b59e069f1e8f30436ea6affb52098b87

Tags

Windows, msvcrt, test cross-built

202601-move-musig-funcs-to-module