Schema field editors (scalar, list, map, locale); entity editors show fields that other mods' schemas add to their kind

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

locale/schema_en.properties

@@ -0,0 +1,6 @@
+tools/entity_editor/section_schema = Fields of other mods
+tools/entity_editor/schema_hint = These fields are described in the schemas of the mods: {0}. The game reads them from the same JSON.
+tools/schema/add_ref = + add…
+tools/schema/list_add = + Add
+tools/schema/list_remove = ✕
+tools/schema/map_add = + Stat