refs https://linear.app/tryghost/issue/CORE-104/decouple-frontend-routing-events-from-urlserver-events
- The 'settings.timezone.edited' event triggers a roundtrip chain of calls in the frontend routing to the url services. It was all handled by event listeners and handler that clearly don't belong there.
- Extracted event realted listeners/handlers into methods and moved most of the logic to the "bootstrap" module, which soon is going to become a "RoutesManger"
- The result of this refactor - no more events going back and forth between frontend routing and the backend!
refs #10790
- Moved /core/apps into core/frontend
- Moved /core/server/helpers to /core/frontend/helpers along with /core/server/services/themes
- Changed helper location in overrides
- Moved /core/server/services/routing to /core/frontend/services
- Moved /core/server/services/url to /core/frontend/services
- Moved /core/server/data/meta to /core/frontend/meta
- Moved /core/server/services/rss to /core/frontend/services
- Moved /core/server/data/xml to /core/frontend/services
