feat(monkey): add cheeky banana-throwing monkey addon

New silverlabs:cheeky_monkey mob that wanders the lobby watching players
and throwing harmless (knockback-only) silverlabs:banana_projectile at
them. Drops 1-2 silverlabs:banana (food) on death. Spawn rules target
jungle biomes for future deployment to survival worlds; for now the pack
is bind-mounted into the lobby service only.

Also bundles a stray docker-compose tidy from earlier local work
(Jamie's world seed pinned, pet addons dropped from Jamie).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

monkey-addon/monkey_RP/textures/item_texture.json

@@ -0,0 +1,9 @@
+{
+  "resource_pack_name": "monkey_RP",
+  "texture_name": "atlas.items",
+  "texture_data": {
+    "banana": {
+      "textures": "textures/items/banana"
+    }
+  }
+}