MenuKit: Containers

MenuKit: Containers 1.1.0

Slot-grafting and in-inventory containers:

• Graft real, persistent, server-synced slots onto vanilla menus - with correct click-through handling and runtime repositioning.
• Per-slot data can now survive a shulker being broken, carried, and replaced.
• Opt a slot-state channel into cross-player-visible state, or keep it per-player.
• Reach placed containers: double-chest resolution, menu-free server-side reads, and a client-capability check - enough to build container locks, automation, and mixed modded/vanilla-client features.

Additive update - no breaking changes; existing slot-state channels register unchanged. Requires MenuKit 1.1.0.