Add more context in the error if tryint to access a v0 CID (starting with "qm")

[pradel]

It is confusing for users unfamiliar with CID versions that a v0 won't work on a subdomain gateway. So we could improve the error message to point the user to the right direction. Right now the message is 400 invalid CID: qmpdslheieutmsrhgfaty5azjefeb2auqe1u32u5hnsyke: To parse non base32 or base58btc encoded CID multibase decoder must be provided.
Could be improved to smth like 400 invalid CID: qmpdslheieutmsrhgfaty5azjefeb2auqe1u32u5hnsyke: To parse non base32 or base58btc encoded CID multibase decoder must be provided. It looks like you are using a CIDv0, try converting it to CIDv1.
Full discussion in Discord https://discord.com/channels/1247475892435816553/1273237594985201816/1354758521060720651