Verify an Ed25519 signature against a message and public key.
signature_payload - The message hash that was signedkey_data - The 32-byte Ed25519 public keysig_data - The 64-byte Ed25519 signaturetrue if the signature is validfalse otherwisefn verify(
env: soroban_sdk::Env,
signature_payload: soroban_sdk::Bytes,
key_data: soroban_sdk::BytesN<32>,
sig_data: soroban_sdk::BytesN<64>,
) -> bool