feat: add screenshots to README for main application window, search dialog, and version selection

Author: devsker

README.md

@@ -63,6 +63,20 @@ python server_pack_builder.py --gui
 - **Multi-Loader Support**: Works with Fabric and Forge mod loaders.
 - **Overrides Preservation**: Keeps configuration and other data from the modpack's `overrides` folder.
 
+## Screenshots
+
+### Main Application Window
+![Main Application Window](screenshots/main_window.png)  
+*The main interface allowing selection between Local and Modrinth modes.*
+
+### Modrinth Search Dialog
+![Modrinth Search Dialog](screenshots/search_dialog.png)  
+*Search for modpacks directly from Modrinth with logo previews.*
+
+### Version Selection
+![Version Selection](screenshots/version_selection.png)  
+*Select specific versions or stick to the latest release.*
+
 ## Development
 
 For linting and testing: