Add application entry point documentation back.

Author: Madeorsk

src/App.tsx

@@ -1,5 +1,30 @@
 import { CRM } from "@/atomic-crm/root/CRM";
 
+/**
+ * Application entry point
+ *
+ * Customize Atomic CRM by passing props to the CRM component:
+ *  - contactGender
+ *  - companySectors
+ *  - darkTheme
+ *  - dealCategories
+ *  - dealPipelineStatuses
+ *  - dealStages
+ *  - lightTheme
+ *  - logo
+ *  - noteStatuses
+ *  - taskTypes
+ *  - title
+ * ... as well as all the props accepted by react-admin's <Admin> component.
+ *
+ * @example
+ * const App = () => (
+ *    <CRM
+ *       logo="./img/logo.png"
+ *       title="Acme CRM"
+ *    />
+ * );
+ */
 const App = () => <CRM />;
 
 export default App;