Huge refactor; Passing tests

SimpleHttpServer/GlobalUsings.cs

@@ -0,0 +1,17 @@
+global using static SimpleHttpServer.GlobalUsings;
+using SimpleHttpServer.Types.Exceptions;
+using System.Diagnostics.CodeAnalysis;
+
+namespace SimpleHttpServer;
+internal static class GlobalUsings {
+    internal static void Assert([DoesNotReturnIf(false)] bool b, string? message = null) {
+        if (!b) {
+            if (message == null)
+                throw new AssertionFailedException("An assertion has failed!");
+            else
+                throw new AssertionFailedException($"An assertion has failed: {message}");
+        }
+    }
+
+    internal static void AssertImplies(bool x, bool y, string? message = null) => Assert(!x || y, message);
+}