chore: rustbacktrace on [#663] (#687)

* enable backtrace on everything in test library

* enable on (disabled) smoke tests

.github/workflows/build-smoke-tests.yml

@@ -4,6 +4,8 @@ on:
   push:
     branches:
       - stop-running
+env:
+  RUST_BACKTRACE: 1
 
 jobs:
   node:

.github/workflows/test-on-pr.yml

@@ -1,6 +1,8 @@
 name: test library
 
 on: pull_request
+env:
+  RUST_BACKTRACE: 1
 
 jobs:
   build-tauri-core: