Refactor display manager and downloader with improved docstrings and error handling

- Enhanced DisplayManager class with detailed docstrings for displayInfo, displayWarn, and displayError methods.
- Updated downloader.py with clearer docstrings and removed unnecessary exception handling.
- Improved instance_manager.py by clarifying the install_instance method and removing redundant try-except blocks.
- Refined mod_manager.py with better docstrings and marked extraction functions for async implementation.
- Updated steam_manager.py with clearer docstrings for add_instance_to_steam function.
- Cleaned up system_manager.py by removing deprecated methods and unnecessary imports.
- Enhanced app_data.py with clearer docstrings and improved instance loading logic.
- Updated content_installer_dialog.py and launcher.py with clearer variable annotations and removed TODOs.
- Modified settingDialog.ui and system_info.ui to improve UI elements and accessibility.
- Updated version numbers in uv.lock for dependencies and ensured compatibility with the latest packages.

packages/io.github.xgui4.lce_qt_launcher.desktop

@@ -1,16 +1,13 @@
 [Desktop Entry]
-Type=Application
-Version=1
-Name=LCE QT Launcher
-GenericName=Minecraft LCE Launcher
+Categories=X-Python;X-Minecraft;Game;X-Utils;Qt
 Comment=A custom Minecraft LCE Launcher written with Pytho using PySide6 (Qt6 for Python)
 Exec=lce-qt-launcher %f
-Icon=io.github.xgui4.lce_qt_launcher.png
-Terminal=true
-MimeType=application/x-lce_inst
+GenericName=Minecraft LCE Launcher
+Icon=io.github.xgui4.lce_qt_launcher
 Keywords=Minecraft;Games;LCE;Python;Qt;Legacy;Console;Edition
-Categories=Python;Minecraft;Game;Utils;Qt
-
-[Desktop Action Generate_Config]
-Exec=lce-qt-launcher -g
-Name=Generate Config
+MimeType=application/x-lce_inst;
+Name=LCE QT Launcher
+StartupNotify=true
+Type=Application
+Version=1.5
+X-KDE-SubstituteUID=false