feat: Added derive macro to implement IntoLua on structs that implement Serialize

This can be very useful if you want to convert a data struct to a lua
table without having to write the boilerplane (however small it may
be).

It also adds the macro on several state structs so they can be
converted to lua in the upcoming ActionCallback refactor.

automation_macro/src/lib.rs

@@ -3,6 +3,7 @@ mod impl_device;
 mod lua_device_config;
 
 use lua_device_config::impl_lua_device_config_macro;
+use quote::quote;
 use syn::{DeriveInput, parse_macro_input};
 
 use crate::impl_device::impl_device_macro;
@@ -20,3 +21,19 @@ pub fn impl_device(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
 
     impl_device_macro(&ast).into()
 }
+
+#[proc_macro_derive(LuaSerialize, attributes(traits))]
+pub fn lua_serialize(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let ast = parse_macro_input!(input as DeriveInput);
+
+    let name = &ast.ident;
+
+    quote! {
+        impl ::mlua::IntoLua for #name {
+            fn into_lua(self, lua: &::mlua::Lua) -> ::mlua::Result<::mlua::Value> {
+                ::mlua::LuaSerdeExt::to_value(lua, &self)
+            }
+        }
+    }
+    .into()
+}