Huge refactor; Passing tests

SimpleHttpServer/Types/ParameterAttribute.cs

@@ -0,0 +1,21 @@
+namespace SimpleHttpServer.Types;
+
+/// <summary>
+/// Specifies the name of a http endpoint parameter. If this attribute is not specified, the variable name is used instead.
+/// </summary>
+[AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
+public sealed class ParameterAttribute : Attribute {
+    // See the attribute guidelines at 
+    //  http://go.microsoft.com/fwlink/?LinkId=85236
+
+    public string Name { get; }
+    public bool IsOptional { get; }
+    public ParameterAttribute(string name, bool isOptional = false) {
+        if (string.IsNullOrWhiteSpace(name)) {
+            throw new ArgumentException($"'{nameof(name)}' cannot be null or whitespace.", nameof(name));
+        }
+
+        Name = name;
+        IsOptional = isOptional;
+    }
+}