Add validator for file types + datapacks (#507)

* Add validator for file types + datapacks

* Make it compile

src/routes/version_creation.rs

@@ -703,6 +703,7 @@ pub async fn upload_file(
         loaders.clone(),
         game_versions.clone(),
         all_game_versions.clone(),
+        file_type,
     )
     .await?;