Reimplement setup for MobX strictness using runnables instead of non-OCP in index.ts

Co-authored-by: Mikko Aspiala <mikko.aspiala@gmail.com>

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

src/main/start-main-application/before-application-is-ready/implementations/setup-mobx.injectable.ts

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+import * as Mobx from "mobx";
+import { getInjectable } from "@ogre-tools/injectable";
+import { beforeApplicationIsReadyInjectionToken } from "../before-application-is-ready-injection-token";
+
+const setupMobxInjectable = getInjectable({
+  id: "setup-mobx",
+
+  instantiate: () => ({
+    run: () => {
+      // Docs: https://mobx.js.org/configuration.html
+      Mobx.configure({
+        enforceActions: "never",
+
+        // TODO: enable later (read more: https://mobx.js.org/migrating-from-4-or-5.html)
+        // computedRequiresReaction: true,
+        // reactionRequiresObservable: true,
+        // observableRequiresReaction: true,
+      });
+    },
+  }),
+
+  injectionToken: beforeApplicationIsReadyInjectionToken,
+});
+
+export default setupMobxInjectable;