Add PACE Anti-Piracy InterLok detection (#362)

* Add detection class and test class for PACE Anti-Piracy Interlok

* Remove unnecessary empty lines after end of class.

* Added missing null check for pex section strings.

* Add newline above getversion

* GetFirstSectionStrings assigned to variable.

* Change getversion in InterLok to use regex.

* Final? getversion regex cleanup

BinaryObjectScanner.Test/Protection/InterLokTests.cs

@@ -0,0 +1,22 @@
+using System.IO;
+using BinaryObjectScanner.Protection;
+using Xunit;
+
+namespace BinaryObjectScanner.Test.Protection
+{
+    public class InterLokTests
+    {
+        [Fact]
+        public void CheckPortableExecutableTest()
+        {
+            string file = "filename";
+            SabreTools.Models.PortableExecutable.Executable model = new();
+            Stream source = new MemoryStream();
+            SabreTools.Serialization.Wrappers.PortableExecutable pex = new(model, source);
+
+            var checker = new InterLok();
+            string? actual = checker.CheckExecutable(file, pex, includeDebug: false);
+            Assert.Null(actual);
+        }
+    }
+}