[FEATURE]: Add Argon2 to Cryptography Registry

## Problem Statement
Argon2 (RFC 9106 standard, winner of 2015 Password Hashing Competition)
is not currently in the CycloneDX Cryptography Registry despite widespread
adoption and OWASP recommendation.

## Proposed Pattern
Argon2(id|i|d)[-{memoryMiB}][-{iterations}][-{parallelism}]

Valid examples:
- Argon2id (variant only)
- Argon2id-15-1-4 (RFC 9106 interactive defaults)
- Argon2id-64-2-1 (medium security)
- Argon2id-256-4-2 (high security)

## Illustration of Compatibility (json)

{
"type": "cryptographic-asset",
"name": "Argon2id-64-2-1",
"cryptoProperties": {
"assetType": "algorithm",
"algorithmProperties": {
"primitive": "password-hashing",
"algorithmFamily": "Argon2",
"parameterSetIdentifier": "id-64-2-1"
}
}
}

## Justification
1. Parametric algorithms are already in registry
2. Parameter variation critically impacts security
3. Enables policy enforcement and CBOM risk assessment
4. RFC 9106 is authoritative standard

## Standards Reference
RFC 9106: Argon2 Memory-Hard Function for Password Hashing