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/render_controllers/heyhe_chicken.render_controllers.json

@@ -0,0 +1,15 @@
+{
+  "format_version": "1.8.0",
+  "render_controllers": {
+    "controller.render.heyhe_chicken": {
+      "geometry": "Geometry.default",
+      "materials": [{ "*": "Material.default" }],
+      "textures": ["Texture.default"]
+    },
+    "controller.render.heyhe_egg": {
+      "geometry": "Geometry.default",
+      "materials": [{ "*": "Material.default" }],
+      "textures": ["Texture.default"]
+    }
+  }
+}