add: 元数据提取

YaeBlog.Core/Models/BlogContent.cs

@@ -4,5 +4,5 @@ public class BlogContent
 {
     public required string FileName { get; init; }
 
-    public required string FileContent { get; init; }
+    public required string FileContent { get; set; }
 }

YaeBlog.Core/Models/BlogEssay.cs

@@ -6,5 +6,12 @@ public class BlogEssay
 
     public required DateTime PublishTime { get; init; }
 
+    public List<string> Tags { get; } = [];
+
     public required string HtmlContent { get; init; }
+
+    public override string ToString()
+    {
+        return $"{Title}-{PublishTime}";
+    }
 }

YaeBlog.Core/Models/MarkdownMetadata.cs

@@ -0,0 +1,10 @@
+namespace YaeBlog.Core.Models;
+
+public class MarkdownMetadata
+{
+    public string? Title { get; set; }
+
+    public DateTime? Date { get; set; }
+
+    public List<string> Tags { get; set; } = [];
+}