feat: add HappyHorse (快乐马) video generation models (#39)

- Add happyhorse.json with 6 models: 1.1/1.0 × T2V/I2V/R2V
- T2V: text-to-video, I2V: image-to-video, R2V: reference-to-video (up to 9 images)
- Provider: HappyHorse via Alibaba Cloud Bailian
- Register in _index.json (now 22 providers)
- Bump presetDataVersion 62→63

compute/model-specs/_index.json

@@ -21,6 +21,7 @@
     "stability",
     "tencent",
     "volcengine",
-    "xunfei"
+    "xunfei",
+    "happyhorse"
   ]
 }