Make user-secrets treat unmatched options as arguments (#18256)

Author: Kahbazi

src/Tools/dotnet-user-secrets/src/CommandLineOptions.cs

@@ -19,7 +19,7 @@ public class CommandLineOptions
 
         public static CommandLineOptions Parse(string[] args, IConsole console)
         {
-            var app = new CommandLineApplication()
+            var app = new CommandLineApplication(treatUnmatchedOptionsAsArguments: true)
             {
                 Out = console.Out,
                 Error = console.Error,

src/Tools/dotnet-user-secrets/test/SecretManagerTests.cs

@@ -93,7 +93,9 @@ public void SetSecrets(bool fromCurrentDirectory)
                             new KeyValuePair<string, string>("key1", Guid.NewGuid().ToString()),
                             new KeyValuePair<string, string>("Facebook:AppId", Guid.NewGuid().ToString()),
                             new KeyValuePair<string, string>(@"key-@\/.~123!#$%^&*())-+==", @"key-@\/.~123!#$%^&*())-+=="),
-                            new KeyValuePair<string, string>("key2", string.Empty)
+                            new KeyValuePair<string, string>("key2", string.Empty),
+                            new KeyValuePair<string, string>("-oneDashedKey", "-oneDashedValue"),
+                            new KeyValuePair<string, string>("--twoDashedKey", "--twoDashedValue")
                         };
 
             var projectPath = _fixture.GetTempSecretProject();