✨ feat: enhance medialib image handling and add asset URL resolution

- Implemented `resolveApiAssetUrl` function to normalize asset URLs based on API base.
- Updated `MedialibImage` component to utilize new asset URL resolution and added support for alt text and class properties.
- Enhanced image loading behavior with improved width measurement and focal point handling.
- Added placeholder image handling and improved accessibility with alt text.
- Introduced new test script for auditing broken links in skill documentation.
- Expanded seeded test content to include medialib entries and updated related tests for pagebuilder previews.
- Improved global setup and teardown logging for clarity on seeded content management.

tests/fixtures/test-constants.ts

@@ -57,6 +57,10 @@ export const SEEDED_TEST_CONTENT = {
         translationKey: "pw-e2e-home",
         path: "/playwright-e2e-home",
     },
+    pagebuilderPreview: {
+        translationKey: "pw-e2e-pagebuilder-preview",
+        path: "/playwright-e2e-pagebuilder-preview",
+    },
     contact: {
         translationKey: "pw-e2e-contact",
         path: "/playwright-e2e-contact",