Introduce a registry into the conversion to intermediate format.

src/intermediate/section.rs

@@ -1,10 +1,15 @@
 use crate::error::CustomError;
 
+use super::registry::Registry;
+
 #[derive(Debug)]
 pub(crate) struct ISection {}
 
 impl ISection {
-    pub(crate) fn new(section: &organic::types::Section<'_>) -> Result<ISection, CustomError> {
+    pub(crate) fn new(
+        registry: &mut Registry<'_>,
+        section: &organic::types::Section<'_>,
+    ) -> Result<ISection, CustomError> {
         Ok(ISection {})
     }
 }