Initial migration commit to .NET 7

Menu, sync and other stuff except resource system should be working.
We're far from finished

Client/Scripts/EntryPoint.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Runtime.InteropServices;
+using GTA;
+using RageCoop.Client;
+using SHVDN;
+
+/// <summary>
+/// Template for generating AOT entrypoints
+/// </summary>
+public static class EntryPoint
+{
+    private static void ModuleSetup()
+    {
+        Script script = new Main();
+        Core.RegisterScript(script);
+        script = new WorldThread();
+        Core.RegisterScript(script);
+        script = new DevTool();
+        Core.RegisterScript(script);
+    }
+
+    [UnmanagedCallersOnly(EntryPoint = "OnInit")]
+    public unsafe static void OnInit(IntPtr module)
+    {
+        try
+        {
+            Core.OnInit(module);
+            ModuleSetup();
+        }
+        catch (Exception ex)
+        {
+            PInvoke.MessageBoxA((IntPtr)0, ex.ToString(), "Module initialization error", 0u);
+            throw;
+        }
+    }
+
+    /// <summary>
+    /// Called prior to module unload
+    /// </summary>
+    /// <param name="module"></param>
+    [UnmanagedCallersOnly(EntryPoint = "OnUnload")]
+    public static void OnUnload(IntPtr module)
+    {
+        try
+        {
+            Core.OnUnload(module);
+        }
+        catch (Exception ex)
+        {
+            Logger.Error((ReadOnlySpan<char>)("Module unload error: " + ex.ToString()));
+        }
+    }
+
+    [UnmanagedCallersOnly(EntryPoint = "OnKeyboard")]
+    public unsafe static void OnKeyboard(int key, ushort repeats, bool scanCode, bool isExtended, bool isWithAlt, bool wasDownBefore, bool isUpNow)
+    {
+        try
+        {
+            Core.DoKeyEvent(key, !isUpNow, (PInvoke.GetAsyncKeyState(17) & 0x8000) != 0, (PInvoke.GetAsyncKeyState(16) & 0x8000) != 0, isWithAlt);
+        }
+        catch (Exception ex)
+        {
+            Logger.Error((ReadOnlySpan<char>)("Keyboard event error: " + ex.ToString()));
+        }
+    }
+
+    [UnmanagedCallersOnly(EntryPoint = "OnTick")]
+    public static void OnTick(IntPtr currentFiber)
+    {
+        try
+        {
+            Core.DoTick(currentFiber);
+        }
+        catch (Exception ex)
+        {
+            Logger.Error((ReadOnlySpan<char>)("Tick error: " + ex.ToString()));
+        }
+    }
+}