add: 未知的终端命令也过滤一下，到时候不执行就好了，不要显示出来

Author: chenxuuu

llcomNext/LLCOM/Models/TerminalCommand.cs

@@ -6,6 +6,7 @@ namespace LLCOM.Models;
 public enum TerminalCommand
 {
     None, //没匹配上任何命令
+    Unknown, //未知命令
 
     Bs, //退格 0x08
     Ht, //水平制表符 0x09
@@ -159,6 +160,8 @@ public static ((TerminalCommand, (int, int)), int) Do(ReadOnlySpan<char> slice)
                     return ((mr, (code,0)), i);
                 }
                 break;
+            default:
+                return ((TerminalCommand.Unknown, (0,0)), i); //未知命令
         }
         //检查是不是匹配\x1b[{n};{m}H
         if(cmd != ';')

llcomNext/llcomTest/TerminalCommandTest.cs

@@ -41,6 +41,8 @@ public void TestMultiple()
             ("\x1b[7m", TerminalCommand.Reverse, (7, 0), 4),
             ("\x1b[31m", TerminalCommand.ForegroundColor, (31, 0), 5),
             ("\x1b[43m", TerminalCommand.BackgroundColor, (43, 0), 5),
+            ("\x1b[2004l", TerminalCommand.Unknown, (0, 0), 7),
+            ("\x1b[2004h", TerminalCommand.Unknown, (0, 0), 7),
         };
 
         foreach (var (input, expectedCmd, expectedPos, expectedLength) in testCases)