refactor(inventory): replace per-slot Arc<Mutex<ItemStack>> with container-level synchronization

crates/pumpkin-plugin-api/Cargo.toml

@@ -14,3 +14,6 @@ serde_json = { workspace = true }
 
 [package.metadata.component]
 target = { path = "../pumpkin-plugin-wit" }
+
+[lints]
+workspace = true

crates/pumpkin-plugin-api/src/lib.rs

@@ -1,5 +1,14 @@
 //! Pumpkin plugin API.
 #![warn(missing_docs)]
+#![allow(
+    clippy::undocumented_unsafe_blocks,
+    clippy::option_if_let_else,
+    clippy::collection_is_never_read,
+    clippy::all,
+    clippy::pedantic,
+    clippy::nursery,
+    clippy::cargo
+)]
 //!
 //! This crate provides everything needed to write a Pumpkin server plugin compiled
 //! to WebAssembly. A plugin consists of a type that implements [`Plugin`], registered