feat(i18n): add license and content usage filter labels

Add new translation keys for model filter interface:
- license
- noCreditRequired
- allowSellingGeneratedContent

These labels support new filtering options for model licensing and content usage permissions, enabling users to filter models based on their license requirements and commercial usage rights.

locales/zh-CN.json

@@ -188,6 +188,9 @@
             "title": "筛选模型",
             "baseModel": "基础模型",
             "modelTags": "标签（前20）",
+            "license": "许可证",
+            "noCreditRequired": "无需署名",
+            "allowSellingGeneratedContent": "允许销售",
             "clearAll": "清除所有筛选"
         },
         "theme": {