feat: tank tree svg cards ready

WotBlitzStatisticsPro.Blazor/Services/ISvgHelper.cs

@@ -0,0 +1,10 @@
+using System.Threading.Tasks;
+using WotBlitzStatisticsPro.Blazor.Model;
+
+namespace WotBlitzStatisticsPro.Blazor.Services
+{
+    public interface ISvgHelper
+    {
+        ElementDimensions CalculateTextBlockSize(string text, string fontFace, int fontSize);
+    }
+}