multibase prefixed CID v0 string should be an error

[olizilla]

this should be an error https://cid.ipfs.tech/#zQmTFGZgypZBYozPTF2qqeho5n17MJXSkHRMDhRqmkroAZu

see: multiformats/js-multiformats#240

currently it shows the multibase as "implicit" but it's been explicitly set... and a CID v0 should not have a multibase prefix.

[nielses]

A similar example here:
https://cid.ipfs.tech/#BCIQJTNS33T6THRXRAR25ZN5TMMORVNP6JKCOS4EW52632DQPVFWMNGY

It shouldn't show multibase as implicit base58btc as it's explicit base32upper. I don't think it should give an error, though (but a warning would be appropriate), because it's actually used as a filename in IPFS Desktop for Windows.

This will give an error:
https://ipfs.io/ipfs/BCIQJTNS33T6THRXRAR25ZN5TMMORVNP6JKCOS4EW52632DQPVFWMNGY

But a valid CID can be found using the CID inspector tool:
https://cid.ipfs.tech/#BCIQJTNS33T6THRXRAR25ZN5TMMORVNP6JKCOS4EW52632DQPVFWMNGY

To arrive at a URI that works:
https://ipfs.io/ipfs/QmYggNCkVfBSLi6Gi1G1JTwVhd7tGpSF5LtwY4LNq5n7fY
or base32 CIDv1 to be more modern:
https://ipfs.io/ipfs/bafybeiezwzn5z7jty3yqi5o4w6zwghi2wx7evbhjoclo5pn5byh2s3ggtm

To break down the Qm CID:
https://cid.ipfs.tech/#QmYggNCkVfBSLi6Gi1G1JTwVhd7tGpSF5LtwY4LNq5n7fY

The filename in IPFS Desktop:
"....ipfs\blocks\NG\CIQJTNS33T6THRXRAR25ZN5TMMORVNP6JKCOS4EW52632DQPVFWMNGY.data"