feat(spark_pet): major overhaul — traits, animations, riding, fire, coloured hatching

- Movement: slower follow (speed 0.3, stop_dist 5), near-zero teleport chance
- Scales: baby 0.65, juvenile 0.9, adult 1.3 (up from 0.4/0.7/1.0)
- Personality traits (0–4): set by feeding specific foods while sneaking;
  affects stroll range, follow distance, look-at-player frequency
- Passtime animations driven by pure Molang lifecycle math (no timer components):
  groom, sniff, stretch, happy_bounce cycling ~every 3 min per dragon
- Rideable adults: minecraft:rideable + input_ground_controlled, seat at [0,0.9,-0.3]
- Fire breathing: autonomous vs monsters (radius 16) + player-triggered (sneak + fire_charge)
- New hatching system: 6 nest block variants (oak/spruce/jungle/crimson/warped/obsidian),
  craft nest + dragon_egg → coloured egg item; place egg, bonemeal + blaze powder → hatch;
  dragon colour matches nest type via 6 separate egg entity types + born_color events
- 18 new PNG textures: 6 dragon colours, 6 nest blocks, 6 egg items (HSV hue rotation)
- Render controller updated to use texture array indexed by silverlabs:dragon_color property

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

addon/spark_pet_RP/render_controllers/spark_dragon.render_controllers.json

@@ -4,11 +4,23 @@
     "controller.render.spark_dragon": {
       "geometry": "Geometry.default",
       "materials": [
-        {
-          "*": "Material.default"
-        }
+        { "*": "Material.default" }
       ],
-      "textures": ["Texture.default"]
+      "textures": [
+        "Array.textures[query.property('silverlabs:dragon_color')]"
+      ],
+      "arrays": {
+        "textures": {
+          "Array.textures": [
+            "Texture.color_0",
+            "Texture.color_1",
+            "Texture.color_2",
+            "Texture.color_3",
+            "Texture.color_4",
+            "Texture.color_5"
+          ]
+        }
+      }
     }
   }
 }