refs #9742
- removed usage of single permalink setting
- with dynamic routing this configuration does no longer makes sense
- because you can configure your permalinks in the routes.yaml
- furthermore you can have multiple collections with multiple permalinks
- removed @blog.permalinks
- do not export permalink setting
- do not import permalink setting
- permalink setting UI will be removed soon
- get rid of {globals.permalink} completely
- remove yaml in-built migration
- do not expose settings.permalinks via the private API
- do not allow to edit this setting
- keep phyiscal value in case a blog needs to rollback from v2 to v1
- sorted out when the routers should be created
- ensure routes.yaml file doesn't get validated before Ghost is fully ready to start
