feat(pet): add Hey Hey chicken pet addon

Tameable white chicken modelled on Hey Hey from Moana — custom plump
geometry, waddly walk/peck animations, hatching egg item, and vanilla
chicken sounds. Mounted on all 4 servers via docker-compose.

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

addon/heyhe_pet_RP/animation_controllers/heyhe_chicken.animation_controllers.json

@@ -0,0 +1,30 @@
+{
+  "format_version": "1.10.0",
+  "animation_controllers": {
+    "controller.animation.heyhe_chicken": {
+      "initial_state": "idle",
+      "states": {
+        "idle": {
+          "animations": ["idle"],
+          "transitions": [
+            { "walking": "query.modified_move_speed > 0.05" },
+            { "sitting": "query.property('silverlabs:heyhe_sitting')" }
+          ]
+        },
+        "walking": {
+          "animations": ["walk"],
+          "transitions": [
+            { "idle": "query.modified_move_speed <= 0.05" },
+            { "sitting": "query.property('silverlabs:heyhe_sitting')" }
+          ]
+        },
+        "sitting": {
+          "animations": ["sit"],
+          "transitions": [
+            { "idle": "!query.property('silverlabs:heyhe_sitting')" }
+          ]
+        }
+      }
+    }
+  }
+}