Renamed the private NuGet source from 'GitLab' to 'Nuget-GitLab-AIFotoONLUS' in CI scripts for clarity and consistency. Added a repository-level NuGet.Config with packageSourceMapping to ensure only specific private packages are restored from the GitLab feed, preventing 401 errors when restoring public packages from nuget.org.
- Add .gitlab-ci.yml for Windows CI/CD: build, publish, and GitLab Release with artifact upload
- Replace GitVersion.MsBuild with MinVer for versioning; update all versioning logic in .csproj
- Remove GitVersion CLI fallback for Visual Studio builds
- Update post-publish renaming to use MinVer's Version property
- Replace multiple thumbnail text checkboxes with a single ComboBox selector in MainWindow.xaml
- Change default UI startup: prefer WPF MainWindow, fallback to WinForms MainForm
