ERC-6538 Stealth Meta-Address Registry

🆔 ERC-165 interface ids

Computed here as the XOR of the selectors each interface defines.

IERC1271	`0x1626ba7e`
IERC6538Registry	`0x7b1f57cb`

`0x3644e515`	`DOMAIN_SEPARATOR()`	view
`0xfe04b106`	`ERC6538REGISTRY_ENTRY_TYPE_HASH()`	view
`0x627cdcb9`	`incrementNonce()`
`0x1626ba7e`	`isValidSignature(bytes32,bytes)`	view
`0xed2a2d64`	`nonceOf(address)`	view
`0x042c7aa3`	`registerKeys(uint256,bytes)`
`0x428d3d0b`	`registerKeysOnBehalf(address,uint256,bytes,bytes)`
`0x7aa8b5ad`	`stealthMetaAddressOf(address,uint256)`	view