Show KCL backtraces (#7033)

* Add backtrace to errors

* Add display of backtraces with hints

* Change pane badge to only show count of errors

* Fix property name to not collide with Error superclass

* Increase min stack again

* Add e2e test that checks that the diagnostics are created in CodeMirror

* Remove unneeded code

* Change to the new hotness

rust/kcl-lib/src/unparser.rs

@@ -881,10 +881,10 @@ pub async fn walk_dir(dir: &std::path::PathBuf) -> Result<Vec<std::path::PathBuf
 #[cfg(not(target_arch = "wasm32"))]
 pub async fn recast_dir(dir: &std::path::Path, options: &crate::FormatOptions) -> Result<(), anyhow::Error> {
     let files = walk_dir(&dir.to_path_buf()).await.map_err(|err| {
-        crate::KclError::Internal(crate::errors::KclErrorDetails {
-            message: format!("Failed to walk directory `{}`: {:?}", dir.display(), err),
-            source_ranges: vec![crate::SourceRange::default()],
-        })
+        crate::KclError::Internal(crate::errors::KclErrorDetails::new(
+            format!("Failed to walk directory `{}`: {:?}", dir.display(), err),
+            vec![crate::SourceRange::default()],
+        ))
     })?;
 
     let futures = files