feat(scripts): 支持动态指标和维度参数配置

为 build_studio_urls.py 添加指标和维度的可配置支持，包括：
- 新增 metrics.json 和 dimensions.json 映射文件加载
- 支持中文/英文别名映射及指标代码透传
- 列别名扩展以识别"指标"和"维度"列
- 空值时自动回退到 CONFIG 默认值

skills/yt-studio-url-builder/scripts/dimensions.json

@@ -0,0 +1,35 @@
+{
+  "内容": "VIDEO",
+  "流量来源": "TRAFFIC_SOURCE_TYPE",
+  "地理位置": "COUNTRY",
+  "频道": "USER",
+  "资产": "ASSET",
+  "频道所有权": "UPLOADER_TYPE",
+  "版权声明状态": "CLAIMED_STATUS",
+  "内容类型": "CREATOR_CONTENT_TYPE",
+  "播放列表": "PLAYLIST",
+  "观看者年龄": "VIEWER_AGE",
+  "观看者性别": "VIEWER_GENDER",
+  "新观看者和回访观看者": "LOYALTY_STATE",
+  "按观看行为细分的观众群": "AUDIENCE_LOYALTY_SEGMENT",
+  "订阅状态": "SUBSCRIBED_TO_UPLOADER_STATE",
+  "订阅来源": "SUBSCRIPTION_SOURCE_TYPE",
+  "YouTube 产品": "PLAYER_APP_TYPE",
+  "设备类型": "DEVICE_PLATFORM_TYPE",
+  "操作系统": "DEVICE_OS_TYPE",
+  "收入来源": "EARNINGS_SOURCE_ALL",
+  "广告类型": "ADTYPES",
+  "交易类型": "TRANSACTION_BUSINESS_MODEL",
+  "自然流量和付费流量": "AD_STATUS",
+  "日期": "DAY",
+  "字幕": "CAPTION_LANGUAGE",
+  "视频信息语言": "VIDEO_METADATA_LANGUAGE",
+  "是否使用翻译": "IS_CROSS_LANGUAGE",
+  "片尾画面元素": "ENDSCREEN_ELEMENT_ID",
+  "片尾画面元素类型": "ENDSCREEN_ELEMENT_TYPE",
+  "卡片": "INFO_CARD_ID",
+  "卡片类型": "INFO_CARD_TYPE",
+  "播放位置": "PLAYBACK_LOCATION_TYPE",
+  "播放器类型": "EMBEDDED_PLAYER_MODE",
+  "分享服务": "SHARING_SERVICE"
+}