Add atomic name trades#325

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JeremyRand wants to merge 5 commits intonamecoin:master-4.0.2from

JeremyRand:ant-4.0.2

Commits on Aug 18, 2022

Added different Sighash_Types (#7453)

dhruv-joshi-7
authored and
Jeremy Rand
committed

Commits on Aug 19, 2022

Namecoin: Raise error if coin selection fails to find name input
Jeremy Rand
committed

Commits on Aug 20, 2022

Namecoin / commands: Add atomic name trades
Jeremy Rand
committed
Namecoin: Add atomic name trade functional tests
Jeremy Rand
committed
Fix imports for Sighash unit tests
Jeremy Rand
committed