docs(mobile-client): update local setup instructions

- Remove git clone instructions
- Replace with download latest release archive
- Update links to point to latest releases page
- Adjust language to reflect new process

Author: fulleni

src/content/docs/mobile-client/local-setup.mdx

@@ -13,14 +13,13 @@ This guide will walk you through setting up and running the Flutter News App Mob
 
     -   **Flutter SDK:** Please follow the [Official Flutter Installation Guide](https://flutter.dev/docs/get-started/install) for your specific operating system.
 
-2.  **Clone the Repository**
+2.  **Download the Latest Release**
 
-    Open your terminal and clone the mobile client repository:
+    Download the source code of the latest release from the GitHub releases page for the Mobile Client:
 
-    ```bash
-    git clone https://github.com/flutter-news-app-full-source-code/flutter-news-app-mobile-client-full-source-code.git
-    cd flutter-news-app-mobile-client-full-source-code
-    ```
+    -   **Mobile Client:** [https://github.com/flutter-news-app-full-source-code/flutter-news-app-mobile-client-full-source-code/releases/latest](https://github.com/flutter-news-app-full-source-code/flutter-news-app-mobile-client-full-source-code/releases/latest)
+
+    After downloading and extracting the archive, navigate into the project directory.
 
 3.  **Install Dependencies**