finish the RP and example

pkg/client/rp/log.go

@@ -0,0 +1,17 @@
+package rp
+
+import (
+	"context"
+
+	"github.com/zitadel/logging"
+	"golang.org/x/exp/slog"
+)
+
+func logCtxWithRPData(ctx context.Context, rp RelyingParty, attrs ...any) context.Context {
+	logger, ok := rp.Logger(ctx)
+	if !ok {
+		return ctx
+	}
+	logger = logger.With(slog.Group("rp", attrs...))
+	return logging.ToContext(ctx, logger)
+}