feat: add test for construct using unit struct

Author: mgi388

crates/languages/bevy_mod_scripting_lua/tests/data/construct/construct_unit_struct.lua

@@ -0,0 +1,4 @@
+local type = world.get_type_by_name("UnitStruct")
+local constructed = construct(type, {})
+
+assert(constructed ~= nil, "Value was not constructed")

crates/testing_crates/test_utils/src/test_data.rs

@@ -139,6 +139,16 @@ impl TestResourceWithVariousFields {
     }
 }
 
+#[derive(Component, Reflect, PartialEq, Eq, Debug, Default)]
+#[reflect(Component, Default)]
+pub struct UnitStruct;
+
+impl UnitStruct {
+    pub fn init() -> Self {
+        Self
+    }
+}
+
 #[derive(Component, Reflect, PartialEq, Eq, Debug, Default)]
 #[reflect(Component, Default)]
 pub struct SimpleStruct {
@@ -256,14 +266,15 @@ impl_test_component_ids!(
         CompWithDefault => 2,
         CompWithDefaultAndComponentData => 3,
         CompWithFromWorldAndComponentData => 4,
-        SimpleStruct => 5,
-        SimpleTupleStruct => 6,
-        SimpleEnum => 7,
+        UnitStruct => 5,
+        SimpleStruct => 6,
+        SimpleTupleStruct => 7,
+        SimpleEnum => 8,
     ],
     [
-        TestResource => 8,
-        ResourceWithDefault => 9,
-        TestResourceWithVariousFields => 10,
+        TestResource => 9,
+        ResourceWithDefault => 10,
+        TestResourceWithVariousFields => 11,
     ]
 );