Workshop improvements and start minimized option

Hello again! This update includes two changes requested by the community.

Workshop improvements

AnimaEngine now tries to browse and download Workshop items through the Steam client using Steamworks (ISteamUGC) before using the previous web-based methods. This improves compatibility on networks where steamcommunity.com may be limited or unavailable. If Steamworks cannot be used, the app keeps the previous methods as fallback options.

Start minimized

A new option called “Start minimized to tray” has been added to Settings. When enabled, AnimaEngine starts directly in the system tray without showing the main window. You can enable or disable this option at any time.

Thank you for the reports and suggestions. They help me keep improving AnimaEngine.