Improve schema and update tags

- Make constants in schema explicit
- Enumerate tag-categories
- More i18n utilities
- Better anonymous user support without special field
- Remove most tuples and unchecked type-casting

src/content/games/crossing-over.md

@@ -38,7 +38,7 @@ tags:
   - non-binary prey
   - micro prey
   - soul vore
-  - implied perma endo
+  - long-term endo
 ---
 
 <iframe