Add .NET 8.0 web app with minimal API and background worker

Introduced a new .NET 8.0 web application project with a minimal API setup.
Configured Swagger for API documentation and added a `Worker` class as a
background service for periodic tasks.

Added `launchSettings.json` to define development profiles for HTTP, HTTPS,
and IIS Express. Configured logging levels in `appsettings.json` and
`appsettings.Development.json`.

Included `Swashbuckle.AspNetCore` package for Swagger integration and
configured the HTTP request pipeline to support development and production
environments.

ECMJobRunner.WebCron/Program.cs

@@ -0,0 +1,27 @@
+using ECMJobRunner.WebCron;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddControllers();
+builder.Services.AddHostedService<Worker>();
+
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();