Add table of OIDs for use when implementing HashML-DSA and HashSLH-DSA

[athoelke]

Fixes #323

[MarcusJGStreets]

I have not checked that you have copied and pasted the OIDs correctly.
But the structure looks good.

[athoelke]

The OID values are correct (match the source documents). The DER-encoded hex values are just the data string part of the encoding - but are missing the OBJECT IDENTIFIER tag and data string length prefix bytes.

For both ML-DSA and SLH-DSA I think these prefix bytes 0609 for NIST and 0608 for SM3 are required for interoperability - the FIPS specifications for the algorithms have 11-byte hex values with the prefix. I copied the hex from the RSASSA-PKCS#1v1.5 table - I need to check if the encoded OID is different for RSA (not wanting the tag+length prefix)...

[athoelke]

FIPS 204 and FIPS 205 state that the hash algorithm identifier string used in the Hash variants must have the OID tag and length included. I will amend this PR to add those bytes to the hex strings here.

For RSASSA-PKCS#1, the OID is enclosed in an AlgorithmIdentifier structure, that must also have an explicit NULL parameters field (after the OID); which is itself included in the DigestInfoValue structure that has the hash value string following the AlgorithmIdentifier. We could clarify that the hex values provided in the table for RSASSA-PKCS#1 are just the OID data values for each hash algorithm?