Ignore invalid I/O notetypes when deciding whether to add

https://forums.ankiweb.net/t/can-t-add-new-cards/37155

rslib/src/image_occlusion/notetype.rs

@@ -46,7 +46,9 @@ impl Collection {
     pub(crate) fn get_first_io_notetype(&mut self) -> Result<Option<Arc<Notetype>>> {
         for nt in self.get_all_notetypes()? {
             if nt.config.original_stock_kind() == OriginalStockKind::ImageOcclusion {
-                return Some(io_notetype_if_valid(nt)).transpose();
+                if let Ok(nt) = io_notetype_if_valid(nt) {
+                    return Ok(Some(nt));
+                }
             }
         }