[core] coregen/types: Implement StructFields for NDArray

Also rename some fields to better align with their naming in numpy.

nac3core/src/codegen/values/ndarray.rs

@@ -326,10 +326,7 @@ impl<'ctx> ArrayLikeIndexer<'ctx> for NDArrayDataProxy<'ctx, '_> {
                 )
                 .unwrap()
         };
-
+        // TODO: Current implementation is transparent
-        // Current implementation is transparent - The returned pointer type is
-        // already cast into the expected type, allowing for immediately
-        // load/store.
         ctx.builder
             .build_pointer_cast(
                 ptr,
@@ -360,10 +357,7 @@ impl<'ctx> ArrayLikeIndexer<'ctx> for NDArrayDataProxy<'ctx, '_> {
         );
 
         let ptr = unsafe { self.ptr_offset_unchecked(ctx, generator, idx, name) };
-
+        // TODO: Current implementation is transparent
-        // Current implementation is transparent - The returned pointer type is
-        // already cast into the expected type, allowing for immediately
-        // load/store.
         ctx.builder
             .build_pointer_cast(
                 ptr,