Studio usability and user experience improvement with an emphasis
on the creation of new applications and menu items.

The main improvement provided by this task is the introduction of a
'Model Configurator', as new dialog that can be accessed when creating
new models in Studio, either through the App Creator or through the
edition of a menu.

This model configurator allows user to select pre-determined behaviours
on their newly-created models. The possible behaviours include:
- m2o to a `res.partner` record ('Customer') which will enable
  the map view on the model
- m2o to a `res.users` record ('Responsible')
- date fields ('Date', 'Date Start', 'Date Stop') which will enable
  the calendar and gantt views on the model respectively
- monetary field ('Value'), which will enable the pivot view on the model
- stage field, which will create a model for this purpose and which will
  enable the kanban view
- image field
- tags field which will create a model for this purpose
- text field ('Notes')
- m2o to a `res.company` field ('Company') - this option is enabled
  by default and is only visible in a multi-company environment; it will
  also create a record rule for the created model to restrict access
  based on the company field.

Along with these, several behaviours are enabled by default and
can only be disabled when in debug mode:
- archiving behaviour
- sequencing of record through a `sequence` field
- inheritance of `mail.thread` and `mail.activity.mixin`

The selected behaviours will be used to automatically generate
views and menu entries (for tags and stages models) in the app.
The enabled view types will depend on the selected behaviours
and will include all relevant fields according in a 'best practice' way
(e.g. images are included in the kanban card, etc.).

Other changes in this task:
- default access rules are more lax than before (CRUD for internal
  users by default)
- small UX improvement in the Studio tabs at the top right


Task 2091654
Community PR: odoo/odoo#42055