feat: 添加内容热重载指令 (#4)

Reviewed-on: #4

YaeBlog.Core/Models/BlogContents.cs

@@ -0,0 +1,10 @@
+using System.Collections.Concurrent;
+
+namespace YaeBlog.Core.Models;
+
+public sealed class BlogContents(ConcurrentBag<BlogContent> drafts, ConcurrentBag<BlogContent> posts)
+{
+    public ConcurrentBag<BlogContent> Drafts { get; } = drafts;
+
+    public ConcurrentBag<BlogContent> Posts { get; } = posts;
+}