Changelog for the upcomming release (preview)

Changes

• Migration to Vue 3 and Pinia

What's Changed

🚀 Enhancements

• Preparation for OpenAPI by @dartcafe in #3745

🐛 Fixed bugs

• bring back admin page by @dartcafe in #3746
• more fixes and optimizations after tests by @dartcafe in #3748

Other Changes

• Enh/deprecations/next by @dartcafe in #3747

Full Changelog: v8.0.0-alpha6...v8.0.0-alpha7