Add engine message to dry run validation error toasts (#5175)

* Add engine message to dry run validation error toasts
Fixes #5174

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Trigger CI

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Add unit tests

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Reset snapshots

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* Revert snapshot changes

* Fix lint

* Fix test

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src/lang/std/engineConnection.ts

@@ -1999,7 +1999,7 @@ export class EngineCommandManager extends EventTarget {
       .catch((e) => {
         // TODO: Previously was never caught, we are not rejecting these pendingCommands but this needs to be handled at some point.
         /*noop*/
-        return null
+        return e
       })
   }
   /**