chore: use file-scoped namespace

src/Shared/HandyControl_Shared/Data/Enum/StrokePosition.cs

@@ -1,9 +1,8 @@
-namespace HandyControl.Data
+namespace HandyControl.Data;
+
+public enum StrokePosition
 {
-    public enum StrokePosition
-    {
-        Center,
-        Outside,
-        Inside
-    }
-}
+    Center,
+    Outside,
+    Inside
+}