* refactored `core/frontend/apps` to destructure common imports
* refactored `core/frontend/services/{apps, redirects, routing}` to destructure common imports
* refactored `core/frontend/services/settings` to destructure common imports
* refactored remaining `core/frontend/services` to destructure common imports
* refactored `core/server/adapters` to destructure common imports
* refactored `core/server/data/{db, exporter, schema, validation}` to destructure common imports
* refactored `core/server/data/importer` to destructure common imports
* refactored `core/server/models/{base, plugins, relations}` to destructure common imports
* refactored remaining `core/server/models` to destructure common imports
* refactored `core/server/api/canary/utils/serializers/output` to destructure common imports
* refactored remaining `core/server/api/canary/utils` to destructure common imports
* refactored remaining `core/server/api/canary` to destructure common imports
* refactored `core/server/api/shared` to destructure common imports
* refactored `core/server/api/v2/utils` to destructure common imports
* refactored remaining `core/server/api/v2` to destructure common imports
* refactored `core/frontend/meta` to destructure common imports
* fixed some tests referencing `common.errors` instead of `@tryghost/errors`
- Not all of them need to be updated; only updating the ones that are
causing failures
* fixed errors import being shadowed by local scope
- Apps are marked as removed in 3.0, never officially launched and have been deprecated for at least 2 years.
- We've slowly removed bits that got in our way or were insecure over time meaning they mostly didn't work
- This cleans up the remainder of the logic
- The tables should be cleaned up in a future major
- Apps are marked as removed in 3.0, never officially launched and have been deprecated for at least 2 years.
- We've slowly removed bits that got in our way or were insecure over time meaning they mostly didn't work
- This cleans up the remainder of the logic
- The tables should be cleaned up in a future major
- Added slugs controller to v2 API
- Added slugs tests to v2 API
- Updated generic validation error message in shared validator to return validation error with sub-message
