feat: add --result as alias for --results CLI argument

Agent-Logs-Url: https://github.com/demaconsulting/FileAssert/sessions/d471742e-a9b9-490a-a3db-2b8b10f09d6d

Co-authored-by: Malcolmnixon <1863707+Malcolmnixon@users.noreply.github.com>

Author: Copilot

src/DemaConsulting.FileAssert/Cli/Context.cs

@@ -254,6 +254,7 @@ private int ParseArgument(string arg, string[] args, int index)
                     LogFile = GetRequiredStringArgument(arg, args, index, "a filename argument");
                     return index + 1;
 
+                case "--result":
                 case "--results":
                     ResultsFile = GetRequiredStringArgument(arg, args, index, "a results filename argument");
                     return index + 1;

test/DemaConsulting.FileAssert.Tests/Cli/ContextTests.cs

@@ -163,6 +163,20 @@ public void Context_Create_ResultsFlag_SetsResultsFile()
         Assert.AreEqual(0, context.ExitCode);
     }
 
+    /// <summary>
+    ///     Test creating a context with the result alias flag.
+    /// </summary>
+    [TestMethod]
+    public void Context_Create_ResultAliasFlag_SetsResultsFile()
+    {
+        // Act
+        using var context = Context.Create(["--result", "test.trx"]);
+
+        // Assert
+        Assert.AreEqual("test.trx", context.ResultsFile);
+        Assert.AreEqual(0, context.ExitCode);
+    }
+
     /// <summary>
     ///     Test creating a context with the log flag.
     /// </summary>