testing all available scan backends and adding gif for readme

MalwareMultiScan.Backends/Backends/Implementations/McAfeeScanBackend.cs

@@ -0,0 +1,27 @@
+using System.Text.RegularExpressions;
+using MalwareMultiScan.Backends.Backends.Abstracts;
+using Microsoft.Extensions.Logging;
+
+namespace MalwareMultiScan.Backends.Backends.Implementations
+{
+    public class McAfeeScanBackend : AbstractLocalProcessScanBackend
+    {
+        public McAfeeScanBackend(ILogger logger) : base(logger)
+        {
+        }
+
+        public override string Id { get; } = "mcafee";
+
+        protected override string BackendPath { get; } = "/usr/local/uvscan/uvscan";
+
+        protected override bool ThrowOnNonZeroExitCode { get; } = false;
+
+        protected override Regex MatchRegex { get; } =
+            new Regex(@".* ... Found: (?<threat>.*).", RegexOptions.Compiled | RegexOptions.Multiline);
+
+        protected override string GetBackendArguments(string path)
+        {
+            return $"--SECURE {path}";
+        }
+    }
+}