Hide auto-generated objects in object list

With filter option to display them,
if desired. decomp-toolkit will
start writing auto-generated objects
in objdiff.json for reporting
purposes, so this maintains the
existing behavior.

objdiff-core/src/config/mod.rs

@@ -120,6 +120,10 @@ impl ProjectObject {
         #[allow(deprecated)]
         self.metadata.as_ref().and_then(|m| m.reverse_fn_order).or(self.reverse_fn_order)
     }
+
+    pub fn hidden(&self) -> bool {
+        self.metadata.as_ref().and_then(|m| m.auto_generated).unwrap_or(false)
+    }
 }
 
 #[derive(Default, Clone, Eq, PartialEq, serde::Deserialize, serde::Serialize)]