feat: Add preliminary iOS support

src/Client/UniScan.Client.App.Platform.iOS/AppDelegate.cs

@@ -1,11 +1,15 @@
+using Avalonia;
+using Avalonia.iOS;
+using Foundation;
+
 namespace UniScan.Client.App.Platform.iOS;
 
 // The UIApplicationDelegate for the application. This class is responsible for launching the 
 // User Interface of the application, as well as listening (and optionally responding) to 
 // application events from iOS.
 [Register("AppDelegate")]
 #pragma warning disable CA1711 // Identifiers should not have incorrect suffix
-public partial class AppDelegate : AvaloniaAppDelegate<App>
+public partial class AppDelegate : AvaloniaAppDelegate<UniScanApp>
 #pragma warning restore CA1711 // Identifiers should not have incorrect suffix
 {
     protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)

src/Client/UniScan.Client.App.Platform.iOS/Main.cs

@@ -1,10 +1,18 @@
+using System.Threading.Tasks;
+using UIKit;
+using UniScan.Platform;
+using UniScan.Platform.Implementations.Native;
+using UniScan.Platform.Implementations.Native.Filesystem;
+
 namespace UniScan.Client.App.Platform.iOS;
 
 public class Application
 {
     // This is the main entry point of the application.
     static void Main(string[] args)
     {
+        UniScanApp.InitializePlatform += () => Task.FromResult(new HostEnvironment(new iOSPaths(), new NativePlatformSerilogInitializer(UniScan.Core.Constants.ConsoleOutputTemplate, UniScan.Core.Constants.FileOutputTemplate), new NativeDirectoryManager(), new NativeFileManager()));
+
         // if you want to use a different Application Delegate class from "AppDelegate"
         // you can specify it here.
         UIApplication.Main(args, null, typeof(AppDelegate));

src/Client/UniScan.Client.App.Platform.iOS/UniScan.Client.App.Platform.iOS.csproj

@@ -14,7 +14,8 @@
     </ItemGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\UniScan.Client.App\UniScan.Client.App.csproj" />
-        <ProjectReference Include="..\UniScan.Client\UniScan.Client.csproj"/>
+        <ProjectReference Include="..\..\Platform\UniScan.Platform.Implementations.Native\UniScan.Platform.Implementations.Native.csproj" />
+        <ProjectReference Include="..\..\Platform\UniScan.Platform\UniScan.Platform.csproj" />
+        <ProjectReference Include="..\UniScan.Client.App\UniScan.Client.App.csproj"/>
     </ItemGroup>
 </Project>

src/Client/UniScan.Client.App.Platform.iOS/iOSPaths.cs

@@ -0,0 +1,15 @@
+using System;
+using System.IO;
+using UniScan.Client.Core;
+using UniScan.Platform;
+
+namespace UniScan.Client.App.Platform.iOS;
+
+public class iOSPaths : IPlatformStandardPaths
+{
+    public string DataPath => Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
+
+    public string ConfigPath => Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
+
+    public string CachePath => Path.Combine(DataPath, ".cache");
+}