✨ 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/global-setup.ts

@@ -34,7 +34,7 @@ async function globalSetup() {
 
         const result = await ensureSeededTestContent(baseURL)
         console.log(
-            `Playwright setup: seeded deterministic content (deleted ${result.deleted}, created ${result.created})`
+            `Playwright setup: seeded deterministic test data (deleted ${result.deleted}, created ${result.created})`
         )
     } finally {
         await ctx.dispose()