Add global exception handling middleware

Introduces `GlobalExceptionHandlerMiddleware` for managing exceptions in the request pipeline, logging them, and returning JSON error responses. A new project, `DigitalData.Core.Exceptions.Middleware`, is created to house this middleware and related classes. The `GlobalExceptionHandlerOptions` class allows for custom exception registration with specific HTTP status codes, while a new `HttpResponse` record encapsulates status codes and messages for structured responses. The middleware is registered in the `DependencyInjection` class for easy integration.

DigitalData.Core.Exceptions.Middleware/DependencyInjection.cs

@@ -0,0 +1,12 @@
+using Microsoft.AspNetCore.Builder;
+
+namespace DigitalData.Core.Exceptions.Middleware;
+
+public static class DependencyInjection
+{
+    public static IApplicationBuilder UseGlobalExceptionHandler(this IApplicationBuilder app)
+    {
+        app.UseMiddleware<GlobalExceptionHandlerMiddleware>();
+        return app;
+    }
+}