Misc improvements and fixes (#109)

* now utilizing tracing better

* better tracing

* fix mac vs pc oppositional env var issue

* modified loading package

* added droppable loadingbarid that sends completion message

* loading bar

* regressed bug on mac

* fixed non-updated loading bar on playground

* Loading bar improvements

---------

Co-authored-by: Jai A <jaiagr+gpg@pm.me>

theseus_gui/src-tauri/src/error.rs

@@ -0,0 +1,18 @@
+use tracing_error::ExtractSpanTrace;
+
+pub fn display_tracing_error(err: &theseus::Error) {
+    match get_span_trace(err) {
+        Some(span_trace) => {
+            tracing::error!(error = %err, span_trace = %span_trace);
+        }
+        None => {
+            tracing::error!(error = %err);
+        }
+    }
+}
+
+pub fn get_span_trace<'a>(
+    error: &'a (dyn std::error::Error + 'static),
+) -> Option<&'a tracing_error::SpanTrace> {
+    error.source().and_then(|e| e.span_trace())
+}