Verify a WebAuthn signature against a message and public key.
signature_payload - The message hash that was signedkey_data - Bytes containing:sig_data - XDR-encoded WebAuthnSigData structure containing:true if the signature is validfalse otherwisefn verify(
env: soroban_sdk::Env,
signature_payload: soroban_sdk::Bytes,
key_data: soroban_sdk::Bytes,
sig_data: soroban_sdk::Bytes,
) -> bool