feat: 初始功能

Models/FileValidationResult.cs

@@ -0,0 +1,17 @@
+namespace CloudPrint.Client.Models;
+
+public sealed class FileValidationResult
+{
+    public bool IsValid { get; init; }
+    public string Message { get; init; } = string.Empty;
+
+    public static FileValidationResult Success(string message = "文件可用")
+    {
+        return new FileValidationResult { IsValid = true, Message = message };
+    }
+
+    public static FileValidationResult Failure(string message)
+    {
+        return new FileValidationResult { IsValid = false, Message = message };
+    }
+}