feat(anthrax-cat): add Maneki-neko lucky cat decoration addon, remove easter egg

- New silverlabs:anthrax_cat entity: sitting cat with waving paw animation,
  idle body bob, look-at-player, fortune message + bell sound on interact
- Custom 64x64 texture (cream/white, red bib, gold coin, orange tabby patches)
- Custom geometry: body, head, ears, raised left arm, tail, bib, coin bones
- Removed easter egg addon mounts from all 4 servers (lobby + 3 child worlds)
- Anthrax Cat mounted on all 4 servers

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

addon/anthrax_cat_BP/entities/anthrax_cat.json

@@ -0,0 +1,79 @@
+{
+  "format_version": "1.21.0",
+  "minecraft:entity": {
+    "description": {
+      "identifier": "silverlabs:anthrax_cat",
+      "is_spawnable": true,
+      "is_summonable": true,
+      "is_experimental": false
+    },
+    "component_groups": {
+      "silverlabs:active": {
+        "minecraft:interact": {
+          "interactions": [
+            {
+              "interact_text": "action.interact.fortune",
+              "play_sounds": "note.bell",
+              "event": "silverlabs:interacted"
+            }
+          ]
+        }
+      }
+    },
+    "components": {
+      "minecraft:type_family": {
+        "family": ["anthrax_cat", "decoration"]
+      },
+      "minecraft:physics": {
+        "has_gravity": true,
+        "has_collision": true
+      },
+      "minecraft:pushable": {
+        "is_pushable": false,
+        "is_pushable_by_piston": false
+      },
+      "minecraft:collision_box": {
+        "width": 0.7,
+        "height": 0.95
+      },
+      "minecraft:knockback_resistance": {
+        "value": 1.0
+      },
+      "minecraft:damage_sensor": {
+        "triggers": [
+          {
+            "cause": "all",
+            "deals_damage": false
+          },
+          {
+            "cause": "override",
+            "deals_damage": true
+          }
+        ]
+      },
+      "minecraft:health": {
+        "value": 20,
+        "max": 20
+      },
+      "minecraft:persistent": {},
+      "minecraft:nameable": {},
+      "minecraft:behavior.look_at_player": {
+        "priority": 1,
+        "target_distance": 8.0,
+        "look_time": [2, 6],
+        "probability_per_distance": 0.02
+      },
+      "minecraft:behavior.random_look_around": {
+        "priority": 2
+      }
+    },
+    "events": {
+      "minecraft:entity_spawned": {
+        "add": {
+          "component_groups": ["silverlabs:active"]
+        }
+      },
+      "silverlabs:interacted": {}
+    }
+  }
+}

addon/anthrax_cat_BP/manifest.json

@@ -0,0 +1,34 @@
+{
+  "format_version": 2,
+  "header": {
+    "name": "Anthrax Cat BP",
+    "description": "Anthrax Cat (Maneki-neko) lucky cat decoration — waving paw, fortune on interact",
+    "uuid": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
+    "version": [1, 0, 0],
+    "min_engine_version": [1, 21, 0]
+  },
+  "modules": [
+    {
+      "type": "data",
+      "uuid": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
+      "version": [1, 0, 0]
+    },
+    {
+      "type": "script",
+      "language": "javascript",
+      "uuid": "e5f6a7b8-c9d0-1234-efab-345678901234",
+      "version": [1, 0, 0],
+      "entry": "scripts/main.js"
+    }
+  ],
+  "dependencies": [
+    {
+      "module_name": "@minecraft/server",
+      "version": "1.17.0"
+    },
+    {
+      "uuid": "c3d4e5f6-a7b8-9012-cdef-123456789012",
+      "version": [1, 0, 0]
+    }
+  ]
+}

addon/anthrax_cat_BP/scripts/main.js

@@ -0,0 +1,23 @@
+import { world } from "@minecraft/server";
+
+const FORTUNES = [
+  "Great fortune smiles upon you today!",
+  "Your builds will be legendary.",
+  "A lucky find awaits you soon.",
+  "Adventure and treasure lie ahead!",
+  "The cat's blessing brings you luck.",
+  "Today is a perfect day to explore.",
+  "Fortune favors the bold builder!",
+  "Something wonderful is about to happen.",
+  "The paw that waves beckons prosperity your way.",
+  "Keep going — great things await you!",
+];
+
+world.afterEvents.playerInteractWithEntity.subscribe((event) => {
+  if (event.target.typeId !== "silverlabs:anthrax_cat") return;
+
+  const player = event.player;
+  const fortune = FORTUNES[Math.floor(Math.random() * FORTUNES.length)];
+
+  player.sendMessage(`§6[✦ Anthrax Cat] §e${fortune}`);
+});