v6.5.0-alpha.53

Features

• Core: Add simplified manager.js/preview.js API for addons (#17755)
• Core/React: Add testing utilities (#17282)

Bug Fixes

• Addon-docs: Fix dependencies for yarn pnp (#17705)
• Webpack: Expand version ranges of webpack in the apps (#17834)
• CLI: Fix vite/jest issue with mocked global (#17830)

Maintenance

• Build: Remove packtracker (#17841)
• Build: Swap order of e2e tests around (#17840)
• Build: Add weekly check for broken markdown links (#17799)
• Build: Switch to use medium+ (#17837)