feat(api): add NestStrategy, NestRequestPart, NestRequest

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

OpenNest.Tests/Api/NestRequestTests.cs

@@ -0,0 +1,45 @@
+using OpenNest.Api;
+using OpenNest.Geometry;
+
+namespace OpenNest.Tests.Api;
+
+public class NestRequestTests
+{
+    [Fact]
+    public void Default_Request_HasSensibleDefaults()
+    {
+        var request = new NestRequest();
+
+        Assert.Empty(request.Parts);
+        Assert.Equal(60, request.SheetSize.Width);
+        Assert.Equal(120, request.SheetSize.Length);
+        Assert.Equal("Steel, A1011 HR", request.Material);
+        Assert.Equal(0.06, request.Thickness);
+        Assert.Equal(0.1, request.Spacing);
+        Assert.Equal(NestStrategy.Auto, request.Strategy);
+        Assert.NotNull(request.Cutting);
+    }
+
+    [Fact]
+    public void Parts_Accessible_AfterConstruction()
+    {
+        var request = new NestRequest
+        {
+            Parts = [new NestRequestPart { DxfPath = "test.dxf", Quantity = 5 }]
+        };
+
+        Assert.Single(request.Parts);
+        Assert.Equal("test.dxf", request.Parts[0].DxfPath);
+        Assert.Equal(5, request.Parts[0].Quantity);
+    }
+
+    [Fact]
+    public void NestRequestPart_Defaults()
+    {
+        var part = new NestRequestPart { DxfPath = "part.dxf" };
+
+        Assert.Equal(1, part.Quantity);
+        Assert.True(part.AllowRotation);
+        Assert.Equal(0, part.Priority);
+    }
+}