Event pages and NPC move routes on RPG maps; rpg action schemas; walk test passes the RPG Plus prologue

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

locale/schema_en.properties

@@ -0,0 +1,10 @@
+rpg/schema/builtin/rpg_battle = Battle from the map
+rpg/schema/builtin/rpg_battle_desc = Enemies, comma separated; the win flag is set on victory
+rpg/schema/field/enemies = Enemies
+rpg/schema/field/win_flag = Win flag
+rpg/schema/builtin/rpg_teleport = Teleport on the map
+rpg/schema/builtin/rpg_teleport_desc = A cell and a facing; the map is optional
+rpg/schema/field/map = Map
+rpg/schema/field/x = X
+rpg/schema/field/y = Y
+rpg/schema/field/dir = Facing