Add command line utils

TiledToOrx.CLI/Program.cs

 using System;
 using System.Text;
 using TiledToOrx.Core;
+using Microsoft.Extensions.CommandLineUtils;
 
 namespace TiledToOrx.CLI
 {
@@ -8,7 +9,25 @@ namespace TiledToOrx.CLI
     {
         static void Main(string[] args)
         {
-            var fileName = args[0];
+            var app = new CommandLineApplication();
+            app.Name = "TiledToOrx";
+            app.Description = "Convert TMX files to Orx config data";
+            app.HelpOption("-?|-h|--help");
+            
+            var fileName = app.Option(
+                "-f|--fileName<optionvalue>",
+                "",
+                CommandOptionType.SingleValue);
+
+            app.OnExecute(() => {
+                Console.WriteLine(fileName);
+
+                return 0;
+            });
+
+            app.Execute(args);
+
+/*             var fileName = args[0];
 
             StringBuilder sb = new StringBuilder();
 
@@ -16,7 +35,7 @@ namespace TiledToOrx.CLI
 
             engine.Convert(fileName, sb, false, 0);
 
-            Console.WriteLine(sb.ToString());
+            Console.WriteLine(sb.ToString()); */
         }
     }
 }

TiledToOrx.CLI/TiledToOrx.CLI.csproj

@@ -4,6 +4,10 @@
     <ProjectReference Include="..\TiledToOrx.Core\TiledToOrx.Core.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.CommandLineUtils" Version="1.1.1" />
+  </ItemGroup>
+
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.0</TargetFramework>