Add .hasrun flag removal along with certificates removal (#1241)

Author: bartizan

DevProxy/Commands/CertCommand.cs

@@ -9,6 +9,7 @@
 using System.CommandLine.Parsing;
 using System.Diagnostics;
 using Titanium.Web.Proxy.Helpers;
+using static DevProxy.Proxy.ProxyEngine;
 
 namespace DevProxy.Commands;
 
@@ -136,5 +137,7 @@ private static void RemoveTrustedCertificateOnMac()
         using var process = new Process() { StartInfo = startInfo };
         _ = process.Start();
         process.WaitForExit();
+
+        HasRunFlag.RemoveFlag();
     }
 }