add simple ast dimension diagnostic

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/debug.rs

@@ -1,5 +1,8 @@
 use std::{any::Any, panic};
 
+/// Export debug proc_macros
+pub use conduit_macros::recursion_depth;
+
 /// Export all of the ancillary tools from here as well.
 pub use crate::utils::debug::*;