add install options (WIP)

ModpackUpdater/InstallOption.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ModpackUpdater;
+
+public class InstallOption
+{
+    public string Id { get; set; }
+    public List<InstallAction> InstallActions { get; } = [];
+    public List<UpdateAction> UninstallActions { get; } = [];
+}