More staging fixes (#768)

* Fixes issues

* staging fixes

* passes tests

* fixes. fmt/clippy

* drops datapack/plugin extras

* fixed failing test

---------

Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/models/v2/projects.rs

@@ -77,7 +77,11 @@ impl LegacyProject {
 
         // V2 versions only have one project type- v3 versions can rarely have multiple.
         // We'll just use the first one.
-        let mut project_type = data.project_types.first().cloned().unwrap_or_default();
+        let mut project_type = data
+            .project_types
+            .first()
+            .cloned()
+            .unwrap_or("unknown".to_string());
         let mut loaders = data.loaders;
 
         if let Some(versions_item) = versions_item {