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_BP/items/banana.json

@@ -0,0 +1,32 @@
+{
+  "format_version": "1.21.0",
+  "minecraft:item": {
+    "description": {
+      "identifier": "silverlabs:banana",
+      "menu_category": {
+        "category": "nature"
+      }
+    },
+    "components": {
+      "minecraft:icon": {
+        "textures": {
+          "default": "banana"
+        }
+      },
+      "minecraft:display_name": {
+        "value": "Banana"
+      },
+      "minecraft:max_stack_size": 64,
+      "minecraft:use_animation": "eat",
+      "minecraft:use_modifiers": {
+        "use_duration": 1.6,
+        "movement_modifier": 0.35
+      },
+      "minecraft:food": {
+        "nutrition": 4,
+        "saturation_modifier": 0.6,
+        "can_always_eat": false
+      }
+    }
+  }
+}