Add RawString type to arguments parser

src/GraphQL.Query.Builder/QueryStringBuilder.cs

@@ -158,6 +158,9 @@ protected internal virtual string FormatQueryParam(object? value)
 
             case bool booleanValue:
                 return booleanValue ? "true" : "false";
+
+            case RawString rawStringValue:
+                return rawStringValue.Value;
 
             case Enum enumValue:
                 return enumValue.ToString();

src/GraphQL.Query.Builder/RawString.cs

@@ -0,0 +1,13 @@
+namespace GraphQL.Query.Builder;
+
+/// <summary>
+/// Represents a raw value that will be inserted as a GraphQL argument with no quotes
+/// </summary>
+/// <param name="value"></param>
+public readonly struct RawString(string value)
+{
+    /// <summary>
+    /// The raw value
+    /// </summary>
+    public string Value { get; } = value;
+}

tests/GraphQL.Query.Builder.UnitTests/QueryStringBuilderTests.cs

@@ -156,6 +156,13 @@ public void TestFormatQueryParam_boolean()
         }
     }
 
+    [Fact]
+    public void TestFormatQueryParam_rawString()
+    {
+        RawString value = new("$file");
+        Assert.Equal("$file", new QueryStringBuilder().FormatQueryParam(value));
+    }
+
     [Fact]
     public void TestFormatQueryParam_enum()
     {