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/RTHydration.spec.ts

@@ -11,17 +11,30 @@ test('should hydrate RT reports correctly', async ({
   DOMOverlayPageObject,
   leftPanelPageObject,
   rightPanelPageObject,
+  viewportPageObject,
 }) => {
   await rightPanelPageObject.toggle();
   await leftPanelPageObject.loadSeriesByModality('RTSTRUCT');
   await page.waitForTimeout(5000);
-  await checkForScreenshot(page, page, screenShotPaths.rtHydration.rtPreHydration);
+  await checkForScreenshot(
+    page,
+    viewportPageObject.grid,
+    screenShotPaths.rtHydration.rtPreHydration
+  );
 
   await DOMOverlayPageObject.viewport.segmentationHydration.yes.click();
   await page.waitForTimeout(5000);
-  await checkForScreenshot(page, page, screenShotPaths.rtHydration.rtPostHydration);
+  await checkForScreenshot(
+    page,
+    viewportPageObject.grid,
+    screenShotPaths.rtHydration.rtPostHydration
+  );
 
   await rightPanelPageObject.labelMapSegmentationPanel.panel.segmentByText('Small Sphere').click();
   await page.waitForTimeout(5000);
-  await checkForScreenshot(page, page, screenShotPaths.rtHydration.rtJumpToStructure);
+  await checkForScreenshot(
+    page,
+    viewportPageObject.grid,
+    screenShotPaths.rtHydration.rtJumpToStructure
+  );
 });