[LSP8] Define if `0x` prefix should be added to `LSP8MetadataBaseURI`

[CJ42]

For LSP8TokenIdFormat 3 or 4 (= bytes32)

Should we construct the final URI like this:

http://mybase.uri/e5fe3851d597a3aa8bbdf8d8289eb9789ca2c34da7a7c3d0a7c442a87b81d5c2

Or like this?

http://mybase.uri/0xe5fe3851d597a3aa8bbdf8d8289eb9789ca2c34da7a7c3d0a7c442a87b81d5c2

Depending on choice, write down the following note in the LSP8 specs under the section LSP8MetadataBaseURI.

Note that for the tokenId format 3 and 4, the 0x prefix of the tokenId MUST / MUST NOT be added in the final constructed URI because