refactor: use struct types for claim related types

BREAKING change.
The following types are changed from interface to struct type:

- AccessTokenClaims
- IDTokenClaims
- IntrospectionResponse
- UserInfo and related types.

The following methods of OPStorage now take a pointer to a struct type,
instead of an interface:

- SetUserinfoFromScopes
- SetUserinfoFromToken
- SetIntrospectionFromToken

The following functions are now generic, so that type-safe extension
of Claims is now possible:

- op.VerifyIDTokenHint
- op.VerifyAccessToken
- rp.VerifyTokens
- rp.VerifyIDToken

pkg/op/token_revocation.go

@@ -151,9 +151,9 @@ func getTokenIDAndSubjectForRevocation(ctx context.Context, userinfoProvider Use
 		}
 		return splitToken[0], splitToken[1], true
 	}
-	accessTokenClaims, err := VerifyAccessToken(ctx, accessToken, userinfoProvider.AccessTokenVerifier(ctx))
+	accessTokenClaims, err := VerifyAccessToken[*oidc.AccessTokenClaims](ctx, accessToken, userinfoProvider.AccessTokenVerifier(ctx))
 	if err != nil {
 		return "", "", false
 	}
-	return accessTokenClaims.GetTokenID(), accessTokenClaims.GetSubject(), true
+	return accessTokenClaims.JWTID, accessTokenClaims.Subject, true
 }