feat(registry): add AES-CMAC-PRF-128 (RFC 4615) (#768)

As discussed in ticket #767, this PR adds AES-CMAC-PRF-128 (RFC 4615) to
the Cryptography Registry.

Fixes #767

Details
- Adds `AES-CMAC-PRF-128` as a `mac` variant under the existing `AES`
family.
- Adds authoritative standards reference for RFC 4615.
- Registry-only change (`schema/cryptography-defs.json`). No schema or
specification behavior changes.

Author: stevespringett

schema/cryptography-defs.json

@@ -122,7 +122,7 @@
           "primitive": "pke"
         }
       ]
-    },
+    },   
     {
       "family": "MQV",
       "standard": [
@@ -362,6 +362,16 @@
           "pattern": "AES[-(128|192|256)][-(GMAC|CMAC)]",
           "primitive": "mac"
         },
+        {
+          "standard": [
+            {
+              "name": "RFC4615",
+              "url": "https://doi.org/10.17487/RFC4615"
+            }
+          ],
+          "pattern": "AES-CMAC-PRF-128",
+          "primitive": "mac"
+        },        
         {
           "pattern": "AES[-(128|192|256)][-(XCBC_MAC[_96])]",
           "primitive": "mac"