test(e2e): update Playwright screenshots and add better tests and assertions for area calculations (#6022)

* Add (better) assertions for area calculation fixes.
* Add SVG and measurement side panel area for freehand ROI test.
* Add Playwright viewport screenshot scope migration guide.
* Update cornerstonjs dependencies to 4.22.8. Ensure all versions of @babel/preset-env are 7.29.5.

---------

Co-authored-by: Ghadeer Albattarni <165973963+GhadeerAlbattarni@users.noreply.github.com>

tests/MPR.spec.ts

@@ -7,8 +7,17 @@ test.beforeEach(async ({ page }) => {
 });
 
 test.describe('MPR Test', async () => {
-  test('should render MPR correctly.', async ({ page, mainToolbarPageObject }) => {
+  test('should render MPR correctly.', async ({
+    page,
+    mainToolbarPageObject,
+    viewportPageObject,
+  }) => {
     await mainToolbarPageObject.layoutSelection.MPR.click();
-    await checkForScreenshot(page, page, screenShotPaths.mpr.mprDisplayedCorrectly);
+
+    await checkForScreenshot(
+      page,
+      viewportPageObject.grid,
+      screenShotPaths.mpr.mprDisplayedCorrectly
+    );
   });
 });