fix(shared): 🐛 readds Transition

readds Transition.ts that somehow got lost. Problem wasn't noticed until clean build because old build output still worked.

shared/src/models/state-machine/Transition.ts

@@ -0,0 +1,7 @@
+import { RdfElement } from "../RdfElement";
+
+export class Transition extends RdfElement {
+    constructor(iri: string) {
+        super(iri);
+    }
+}