Improvements/implicit usings

[GuyPago]

Resolves #issueNumber
Type: improvements

Issue

Grand.Common.props should be as clean as possible. It manualy adds common namespaces as global, while .NET 6 provided a cleaner, built in way to do so.

Solution

Add UseGlobalUsings which behaves differently across different SDKs. e.g for Web environment:

Grand.Web.GlobalUsings.g.cs

// <auto-generated/>
global using global::Microsoft.AspNetCore.Builder;
global using global::Microsoft.AspNetCore.Hosting;
global using global::Microsoft.AspNetCore.Http;
global using global::Microsoft.AspNetCore.Routing;
global using global::Microsoft.Extensions.Configuration;
global using global::Microsoft.Extensions.DependencyInjection;
global using global::Microsoft.Extensions.Hosting;
global using global::Microsoft.Extensions.Logging;
global using global::System;
global using global::System.Collections.Generic;
global using global::System.IO;
global using global::System.Linq;
global using global::System.Net.Http;
global using global::System.Net.Http.Json;
global using global::System.Text;
global using global::System.Threading;
global using global::System.Threading.Tasks;

Breaking changes

Testing

[GuyPago]

@KrzysztofPajak Do you want me to add another commit that removes unused imports across the project that resulted from this PR?

[KrzysztofPajak]

There will probably be a lot of files, let's leave it as it is