Initial migration commit to .NET 7

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

Client/Scripts/Scripting/ClientScript.cs

@@ -4,10 +4,6 @@ using RageCoop.Core.Scripting;
 
 namespace RageCoop.Client.Scripting
 {
-    /// <summary>
-    ///     Inherit from this class, constructor will be called automatically, but other scripts might have yet been loaded,
-    ///     you should use <see cref="OnStart" />. to initiate your script.
-    /// </summary>
     public abstract class ClientScript : Script
     {
         /// <summary>
@@ -24,16 +20,5 @@ namespace RageCoop.Client.Scripting
         ///     Eqivalent of <see cref="ClientResource.Logger" /> in <see cref="CurrentResource" />
         /// </summary>
         public Logger Logger => CurrentResource.Logger;
-
-        /// <summary>
-        ///     This method would be called from main thread, right after all script constructors are invoked.
-        /// </summary>
-        public abstract void OnStart();
-
-        /// <summary>
-        ///     This method would be called from main thread right before the whole <see cref="System.AppDomain" /> is unloded but
-        ///     prior to <see cref="GTA.Script.Aborted" />.
-        /// </summary>
-        public abstract void OnStop();
     }
 }