Create a render ast node type.

src/intermediate/ast_node.rs

@@ -55,7 +55,7 @@ use super::IVerseBlock;
 use crate::error::CustomError;
 use futures::future::{BoxFuture, FutureExt};
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub(crate) enum IAstNode {
     Heading(IHeading),
     Section(ISection),