Add native UI decision and testing workflow

crates/lumbridge-core/tests/public_contract.rs

@@ -0,0 +1,10 @@
+use lumbridge_core::{Platform, ProductStatus, UsageProvenance};
+
+#[test]
+fn downstream_crates_can_use_the_public_scaffold_contract() {
+    let status = ProductStatus::architecture_phase(Platform::ArchLinux);
+
+    assert_eq!(status.platform.to_string(), "Arch Linux / Omarchy");
+    assert!(status.message.contains("Architecture scaffold"));
+    assert_eq!(UsageProvenance::Estimated, UsageProvenance::Estimated);
+}