Remove lifetime mess, replace a lot of code with Arc instead of borrows.

This cleans up the codebase massively, and allows me to maintain some semblance of sanity.

src/script_implementations/wasm/script_function_cache.rs

@@ -58,5 +58,5 @@ macro_rules! script_function_cache {
 
 script_function_cache! {
     on_initialize -> NativeFunc<(u32, ExternRef<DynamicLibrary>, VecExternRef<EffectParameter>), ()>
-    on_before_turn -> NativeFunc<(u32, u32), ()>
+    on_before_turn -> NativeFunc<(u32, ExternRef<TurnChoice>), ()>
 }