Creates a new organsied formatting system for webhook data, with
interfaces for extending with custom model formatting rules.
Allows easy usage & extension of the default bookstack formatting
behaviour when customizing webhook events via theme system, and keeps
default data customizations organised.
This also makes the following webhook data changes:
- owned_by/created_by/updated_by user details are loaded for events with
Entity details. (POTENTIALLY BREAKING CHANGE).
- current_revision details are loaded for page update/create events.
Added testing to cover added model formatting rules.
For #3279 and #3218
Updated the getUrl method on deletions to not require any passed
params to align with usage in webhooks.
Probably better to have a proper interface but would require a wider
change.
Fixes#3154
- Added testing to cover warning cases.
- Refactored logic to be simpler and move much of the business out of
the controller.
- Added new message that's more suitable to the case this was handling.
- For detecting an outdated draft, checked the draft created_at time
instead of updated_at to better fit the scenario being checked.
- Updated some method types to align with those potentially being used
in the logic of the code.
- Added a cache of shown messages on the front-end to prevent them
re-showing on every save during the session, even if dismissed.
Tools seems to fit better since the classes were a bit of a mixed bunch
and did not always manage.
Also simplified the structure of the SlugGenerator class.
Also focused EntityContext on shelves and simplified to use session
helper.
