[NaySurGithub]

Batch 3 of the plugin API additions.

Depends on the batch 2 PR (#14); merge that one first. The base branch is the batch 2 branch so the diff only shows this batch.

What it adds

• Container blocks of a level (chests, barrels, furnaces, hoppers and every block actor with a container): levelContainerSize, levelContainerItem (a copy), levelSetContainerItem (a null item empties the slot).
• Signs and hanging signs: levelSignText, levelSetSignText, front or back.
• The player's ender chest: playerEnderChestSize, playerEnderChestItem, playerSetEnderChestItem.
• C++ (Level, PlayerInventory), Java and Wasm bindings, README section.

All functions are appended at the end of FalconServerApi (API 1.0.6, bumped by batch 1).

Not added

• Virtual chest menus (a chest window that belongs to no block): the server has no block-less container window; the item stack request handler resolves containers through block actors only.

Checks

CI of the batch 6 branch (feat/world), which contains this one: Linux, Windows (MSVC and MinGW), .NET and Java jobs green; the macOS jobs were cancelled by the runner, as on main.