feat(release): Packaging für Zorin OS 18 (.deb & .AppImage), In-App Gitea Updater und CI/CD Workflow

Cargo.toml

@@ -28,6 +28,7 @@ serde_json = "1.0.151"
 egui = "0.27"
 egui-wgpu = "0.27"
 egui-winit = { version = "0.27", default-features = false, features = ["links"] }
+webbrowser = "0.8"
 
 [profile.dev]
 opt-level = 1 # Erhöht Rendering-Performance auch im Debug-Modus