Add the F1 ECS inspector overlay to the world scene

Bump the engine submodule to 09dbdfa (MrGameEng.Inspector) and wire the
new DevTools-style ECS debugger into WorldScene via UseInspector(renderer),
before UseDevConsole so the console still draws on top. The HUD controls
hint now mentions F1.

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

Mods/Core/Languages/en/ui.json

@@ -1,6 +1,6 @@
 {
   "hud.world": "LittleSim | seed {0} | day {1} | {2} FPS",
-  "hud.controls": "WASD — camera, wheel — zoom, ` — console ('help' lists commands)",
+  "hud.controls": "WASD — camera, wheel — zoom, ` — console, F1 — inspector",
   "hud.paused": "PAUSED",
 
   "menu.title": "LittleSim",