feat: remove giant dependency

Kiseki.Launcher.Windows/Kiseki.Launcher.Windows.csproj

@@ -45,8 +45,4 @@
   <ItemGroup>
     <Compile Include="..\Kiseki.Launcher\**\*.cs" />
   </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Syroot.Windows.IO.KnownFolders" Version="1.3.0" />
-  </ItemGroup>
 </Project>

Kiseki.Launcher.Windows/Launcher.cs

@@ -2,8 +2,6 @@ using System.Reflection;
 
 using Microsoft.Win32;
 
-using Syroot.Windows.IO;
-
 namespace Kiseki.Launcher.Windows
 {
     public class Launcher : ILauncher
@@ -58,7 +56,7 @@ namespace Kiseki.Launcher.Windows
                 {
                     Title = "Select your license file",
                     Filter = "License files (*.bin)|*.bin",
-                    InitialDirectory = KnownFolders.Downloads.Path
+                    InitialDirectory = Win32.GetDownloadsPath()
                 };
 
                 if (dialog.ShowDialog() == DialogResult.OK)

Kiseki.Launcher.Windows/Win32.cs

@@ -0,0 +1,16 @@
+using System.Runtime.InteropServices;
+
+namespace Kiseki.Launcher.Windows
+{
+    public static class Win32
+    {
+        [DllImport("shell32", CharSet = CharSet.Unicode, ExactSpelling = true, PreserveSig = false)]
+        private static extern string SHGetKnownFolderPath([MarshalAs(UnmanagedType.LPStruct)] Guid rfid, uint dwFlags, nint hToken = default);
+
+        // https://www.codeproject.com/Articles/878605/Getting-All-Special-Folders-in-NET
+        public static string GetDownloadsPath()
+        {
+            return SHGetKnownFolderPath(new("374DE290-123F-4565-9164-39C4925E467B"), 0);
+        }
+    }
+}