Add workaround for bulkBarrierPreWrite: unaligned arguments panic

experimental/libbox/panic.go

@@ -0,0 +1,12 @@
+package libbox
+
+// https://github.com/golang/go/issues/46893
+// TODO: remove after `bulkBarrierPreWrite: unaligned arguments` fixed
+
+type StringBox struct {
+	Value string
+}
+
+func wrapString(value string) *StringBox {
+	return &StringBox{Value: value}
+}