Enable Swagger via configuration setting

Added a condition in `Program.cs` to enable Swagger when the `UseSwagger` configuration value is `true`, in addition to the development environment.

Introduced a new `UseSwagger` setting in `appsettings.json` with a default value of `true`, allowing Swagger to be conditionally enabled in non-development environments. This improves flexibility for Swagger usage across different environments.

src/ReC.API/Program.cs

@@ -57,7 +57,7 @@ try
 #pragma warning restore CS0618
 
     // Configure the HTTP request pipeline.
-    if (app.Environment.IsDevelopment())
+    if (app.Environment.IsDevelopment() || config.GetValue<bool>("UseSwagger"))
     {
         app.UseSwagger();
         app.UseSwaggerUI();