feat: Parser Combinator库和词法分析器 (#2)

Reviewed-on: https://git.bupt-hpc.cn/jackfiled/CanonSharp/pulls/2
Co-authored-by: jackfiled <xcrenchangjun@outlook.com>
Co-committed-by: jackfiled <xcrenchangjun@outlook.com>

CanonSharp.Combinator/ParseException.cs

@@ -0,0 +1,15 @@
+namespace CanonSharp.Combinator;
+
+/// <summary>
+/// 解析过程中的异常
+/// </summary>
+public class ParseException : Exception
+{
+    public ParseException(string message) : base(message)
+    {
+    }
+
+    public ParseException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
+}