Non-custodial in-app SimpleX name registration. Wallet and ERC-5564
stealth crypto, the names-service interface with an in-memory mock that
verifies real EIP-712 signatures, SQLite/Postgres migrations, the
signed-intent commands, and CLI + end-to-end test coverage (WalletTests,
ChatTests.Names). Bumps the simplexmq pin to c85a895a. GUI code follows
in a stacked PR.