feat(authlib): add JsonWebKey2020 verification method support

Add support for JsonWebKey2020 verification method type to AuthlibKey,
allowing use of JWK-formatted keys in DID documents.

Signed-off-by: Daniel Bluhm <dbluhm@pm.me>

Author: dbluhm

didcomm_messaging/crypto/backend/authlib.py

@@ -104,6 +104,17 @@ def from_verification_method(cls, vm: VerificationMethod) -> "AuthlibKey":
             key = cls.multikey_to_key(multikey)
             return cls(key, kid)
 
+        if vm.type == "JsonWebKey2020":
+            jwk = vm.public_key_jwk
+            if not jwk:
+                raise ValueError("JWK verification method missing key")
+
+            try:
+                key = JsonWebKey.import_key(jwk)
+            except Exception as err:
+                raise ValueError("Invalid JWK") from err
+            return cls(key, kid)
+
         codec = cls.type_to_codec.get(vm.type)
         if not codec:
             raise ValueError("Unsupported verification method type: {vm_type}")