Converting Tests back to C# but still with Playwright

Tests/Pages/BuildCalculator/TimelineComponent.cs

@@ -0,0 +1,16 @@
+namespace Tests.Pages.BuildCalculator;
+
+public class TimelineComponent
+{
+    private readonly Website _website;
+    public TimelineComponent(Website website) => _website = website;
+
+    public ILocator Container =>
+        _website.Locator(".calculatorGrid > div").Filter(new() { HasText = "Timeline highlights" });
+
+    public async Task<bool> ContainsEntityAsync(string name)
+    {
+        var text = (await Container.TextContentAsync()) ?? "";
+        return text.Contains(name);
+    }
+}