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/entity/heyhe_chicken.entity.json

@@ -0,0 +1,36 @@
+{
+  "format_version": "1.10.0",
+  "minecraft:client_entity": {
+    "description": {
+      "identifier": "silverlabs:heyhe_chicken",
+      "materials": {
+        "default": "entity_alphatest"
+      },
+      "textures": {
+        "default": "textures/entity/heyhe_chicken"
+      },
+      "geometry": {
+        "default": "geometry.heyhe_chicken"
+      },
+      "render_controllers": [
+        "controller.render.heyhe_chicken"
+      ],
+      "animations": {
+        "idle": "animation.heyhe_chicken.idle",
+        "walk": "animation.heyhe_chicken.walk",
+        "sit": "animation.heyhe_chicken.sit",
+        "controller": "controller.animation.heyhe_chicken"
+      },
+      "scripts": {
+        "animate": ["controller"]
+      },
+      "particle_effects": {
+        "hearts": "minecraft:heart_particle"
+      },
+      "spawn_egg": {
+        "base_color": "#F5F5F0",
+        "overlay_color": "#E07020"
+      }
+    }
+  }
+}

addon/heyhe_pet_RP/entity/heyhe_egg.entity.json

@@ -0,0 +1,20 @@
+{
+  "format_version": "1.10.0",
+  "minecraft:client_entity": {
+    "description": {
+      "identifier": "silverlabs:heyhe_egg",
+      "materials": {
+        "default": "entity_alphatest"
+      },
+      "textures": {
+        "default": "textures/entity/heyhe_egg"
+      },
+      "geometry": {
+        "default": "geometry.heyhe_egg"
+      },
+      "render_controllers": [
+        "controller.render.heyhe_egg"
+      ]
+    }
+  }
+}