[FullBlade]katana scabbard

Since I will be uploading some swords from the Demon Slayer series later, and they share the same scabbard design, I am uploading a shared file first.Of course, this scabbard is also compatible with the previously uploaded Real size katana.The difference from the instruction manual is the locking mechanism at the tail. The old version tended to crack along the layer lines, so it has been redesigned into multiple parts.