Move Crunch to its own Packer, improve SmartE detection. (#353)

* Move Crunch to its own Packer, improve SmartE detection.

* Fix formatting by removing brackets

Co-authored-by: Matt Nadareski <mnadareski@outlook.com>

* Remove named section checks, minor formatting fixes

* Add newline before summary.

* Remove empty returns.

* Remove unnecessary newline

* Change Crunch to use IExtractableExecutable

* Remove unnecessary whitespace.

* Add tests for Crunch.

---------

Co-authored-by: Matt Nadareski <mnadareski@outlook.com>

BinaryObjectScanner.Test/Packer/CrunchTests.cs

@@ -0,0 +1,36 @@
+using System.IO;
+using BinaryObjectScanner.Packer;
+using Xunit;
+
+namespace BinaryObjectScanner.Test.Packer
+{
+    public class CrunchTests
+    {
+        [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 Crunch();
+            string? actual = checker.CheckExecutable(file, pex, includeDebug: false);
+            Assert.Null(actual);
+        }
+
+        [Fact]
+        public void ExtractPortableExecutableTest()
+        {
+            string file = "filename";
+            SabreTools.Models.PortableExecutable.Executable model = new();
+            Stream source = new MemoryStream();
+            SabreTools.Serialization.Wrappers.PortableExecutable pex = new(model, source);
+            string outputDir = string.Empty;
+
+            var checker = new Crunch();
+            bool actual = checker.Extract(file, pex, outputDir, includeDebug: false);
+            Assert.False(actual);
+        }
+    }
+}