✨ 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.

.gitignore

@@ -13,6 +13,8 @@ playwright/.cache/
 visual-review/
 video-tours/output/
 .playwright-mcp/
+.agents/STARTER_ALIGNMENT_*.md
+
 .yarn/*
 !.yarn/cache
 !.yarn/patches