Add the skeletons for the objects.

src/intermediate/footnote_reference.rs

@@ -0,0 +1,15 @@
+use crate::error::CustomError;
+
+use super::registry::Registry;
+
+#[derive(Debug)]
+pub(crate) struct IFootnoteReference {}
+
+impl IFootnoteReference {
+    pub(crate) async fn new<'parse>(
+        registry: &mut Registry<'parse>,
+        original: &organic::types::FootnoteReference<'parse>,
+    ) -> Result<IFootnoteReference, CustomError> {
+        Ok(IFootnoteReference {})
+    }
+}