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/SEGNoHydrationThenMPR.spec.ts

@@ -11,17 +11,26 @@ test('should launch MPR with unhydrated SEG', async ({
   leftPanelPageObject,
   mainToolbarPageObject,
   rightPanelPageObject,
+  viewportPageObject,
 }) => {
   await rightPanelPageObject.toggle();
   await leftPanelPageObject.loadSeriesByDescription('SEG');
 
   await page.waitForTimeout(5000);
 
-  await checkForScreenshot(page, page, screenShotPaths.segNoHydrationThenMPR.segNoHydrationPreMPR);
+  await checkForScreenshot(
+    page,
+    viewportPageObject.grid,
+    screenShotPaths.segNoHydrationThenMPR.segNoHydrationPreMPR
+  );
 
   await mainToolbarPageObject.layoutSelection.MPR.click();
 
   await page.waitForTimeout(5000);
 
-  await checkForScreenshot(page, page, screenShotPaths.segNoHydrationThenMPR.segNoHydrationPostMPR);
+  await checkForScreenshot(
+    page,
+    viewportPageObject.grid,
+    screenShotPaths.segNoHydrationThenMPR.segNoHydrationPostMPR
+  );
 });