NSwag support#

Follow the basic instructions for NSwag integration, then modify as follows:

Add packages to your project to support NSwag. The following packages are required:
- NSwag.AspNetCore.
- CommunityToolkit.Datasync.Server.NSwag.
Add the following to the top of your Program.cs file:
```
using CommunityToolkit.Datasync.Server.NSwag;
```

Add a service to generate an OpenAPI definition to your Program.cs file:

builder.Services.AddOpenApiDocument(options =>
{
    options.AddDatasyncProcessors();
});

Enable the middleware for serving the generated JSON document and the Swagger UI, also in Program.cs:
```
if (app.Environment.IsDevelopment())
{
    app.UseOpenApi();
    app.UseSwaggerUI3();
}
```

Browsing to the /swagger endpoint of the web service allows you to browse the API. The OpenAPI definition can then be imported into other services (such as Azure API Management). For more information on configuring NSwag, see Get started with NSwag and ASP.NET Core.