Add paragraph.

src/intermediate/element.rs

@@ -1,9 +1,12 @@
 use crate::error::CustomError;
 
 use super::registry::Registry;
+use super::IParagraph;
 
 #[derive(Debug)]
-pub(crate) enum IElement {}
+pub(crate) enum IElement {
+    Paragraph(IParagraph),
+}
 
 impl IElement {
     pub(crate) fn new<'parse>(
@@ -11,7 +14,9 @@ impl IElement {
         elem: &organic::types::Element<'parse>,
     ) -> Result<IElement, CustomError> {
         match elem {
-            organic::types::Element::Paragraph(_) => todo!(),
+            organic::types::Element::Paragraph(inner) => {
+                Ok(IElement::Paragraph(IParagraph::new(registry, inner)?))
+            }
             organic::types::Element::PlainList(_) => todo!(),
             organic::types::Element::CenterBlock(_) => todo!(),
             organic::types::Element::QuoteBlock(_) => todo!(),