Dev spawner: RimWorld-style moddable spawn/damage tool (dev mode only)

A side panel (F9, only when developer mode is on) lists entries by category:
animals and plants are auto-populated from their defs (so modded content shows up
automatically), plus action tools. Spawn entries arm a "tool in hand" — left-click
the world to spawn at the cursor (right-click clears); action tools (injure/kill/
infect) apply to the currently selected creature, so you can line up entities and
damage them to compare. Moddable via a new DevToolDef def type: mods add buttons
referencing a code handler kind (spawn-animal/plant/infect/damage/kill) + target,
without touching code. Localized dev.* ru/en. Build + --check-content clean
(13 def types).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Mods/Core/Languages/ru/ui.json

@@ -114,6 +114,15 @@
   "settings.volume": "Громкость",
   "settings.uiscale": "Масштаб UI",
   "settings.devmode": "Режим разработчика",
+  "dev.title": "Дев-спавнер",
+  "dev.hint": "Выбери пункт · F9 — скрыть",
+  "dev.armed": "В руке: {0} · ЛКМ — спавн, ПКМ — снять",
+  "dev.tools": "Инструменты",
+  "dev.damage": "Ранить выбранного",
+  "dev.kill": "Убить выбранного",
+  "dev.infect": "Заразить выбранного",
+  "dev.animals": "Животные",
+  "dev.plants": "Растения",
   "settings.apply": "Применить",
   "settings.back": "Назад",
   "pause.title": "Пауза",