Create GraphQL project (#1334)

* Create new project for GraphQL

* ...

* .

* ok?

* Update src/WireMock.Net.Shared/Extensions/AnyOfExtensions.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* --

* ...

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/WireMock.Net.GraphQL/Models/SchemaDataWrapper.cs

@@ -0,0 +1,18 @@
+// Copyright © WireMock.Net
+
+using GraphQL.Types;
+using WireMock.Models.GraphQL;
+
+namespace WireMock.Models;
+
+/// <summary>
+/// Represents a wrapper for schema data, providing access to the associated schema.
+/// </summary>
+/// <param name="schema"></param>
+public class SchemaDataWrapper(ISchema schema) : ISchemaData
+{
+    /// <summary>
+    /// Gets the schema associated with the current instance.
+    /// </summary>
+    public ISchema Schema { get; } = schema;
+}

src/WireMock.Net.GraphQL/Models/WireMockCustomScalarGraphType.cs

@@ -0,0 +1,31 @@
+// Copyright © WireMock.Net
+
+using System;
+using GraphQL.Types;
+
+// ReSharper disable once CheckNamespace
+namespace WireMock.GraphQL.Models;
+
+/// <inheritdoc />
+public abstract class WireMockCustomScalarGraphType<T> : ScalarGraphType
+{
+    /// <inheritdoc />
+    public override object? ParseValue(object? value)
+    {
+        switch (value)
+        {
+            case null:
+                return null;
+
+            case T:
+                return value;
+        }
+
+        if (value is string && typeof(T) != typeof(string))
+        {
+            throw new InvalidCastException($"Unable to convert value '{value}' of type '{typeof(string)}' to type '{typeof(T)}'.");
+        }
+
+        return (T)Convert.ChangeType(value, typeof(T));
+    }
+}