refactor(services): split services into separate folders and update namespaces

Services/AI/IAiService.cs

@@ -0,0 +1,35 @@
+namespace Foxel.Services.AI;
+
+public interface IAiService
+{
+    /// <summary>
+    /// 分析图像并返回标题和描述
+    /// </summary>
+    /// <param name="base64Image">Base64格式的图像数据</param>
+    /// <returns>图像的标题和描述</returns>
+    Task<(string title, string description)> AnalyzeImageAsync(string base64Image);
+    
+    /// <summary>
+    /// 基于描述匹配标签
+    /// </summary>
+    /// <param name="description">图片描述</param>
+    /// <param name="availableTags">可用标签列表</param>
+    /// <returns>匹配的标签名称列表</returns>
+    Task<List<string>> MatchTagsAsync(string description, List<string> availableTags);
+    
+    /// <summary>
+    /// 直接从图像生成标签
+    /// </summary>
+    /// <param name="base64Image">Base64格式的图像数据</param>
+    /// <param name="availableTags">可用标签列表</param>
+    /// <param name="allowNewTags">是否允许生成新标签(不在availableTags中的标签)</param>
+    /// <returns>匹配的标签名称列表</returns>
+    Task<List<string>> GenerateTagsFromImageAsync(string base64Image, List<string> availableTags, bool allowNewTags = false);
+
+    /// <summary>
+    /// 获取文本的嵌入向量
+    /// </summary>
+    /// <param name="text">需要进行嵌入的文本</param>
+    /// <returns>表示文本语义的浮点数组向量</returns>
+    Task<float[]> GetEmbeddingAsync(string text);
+}