Integrate Shulker SDK

We need to:

~~- [ ] **Update game servers to latest Minestom**~~ *(can't do just yet requires Java 25 which Shulker does not use)*
- [x] **Fork the Shulker SDK and update it** *(done see https://github.com/jeremylvln/Shulker/pull/1119)*
- [ ] **Import and configure the SDK into our projects** *(blocking on https://github.com/jeremylvln/Shulker/pull/1119)*