0xchat: Namecoin .bit NIP-05 resolution for DM impersonation defense
A PR against 0xchat-app/0xchat-app-main adds Namecoin .bit NIP-05 resolution to the existing NIP-05 path, plus a distinct Namecoin badge in the contact / profile / user-center views so DM users can tell DNS-backed identities from chain-backed ones at a glance. Seventh shipping reference implementation of Namecoin NIP-05 across five runtimes.
