Merge pull request ipfs/boxoipfs/interface-go-ipfs-core#5 from ipfs/feat/not-supported-error

errors: introduce a 'not supported' error This commit was moved from ipfs/interface-go-ipfs-core@a10c4530cdbefb185d35fb83e9bd58c9f504f968 This commit was moved from ipfs/boxo@8fc5c07e6b41ffff67528441199d44667ab437b5