[IMP] web: create a properties field component

Purpose
=======

Create a component for the new Properties field. This component instantiates
the right sub-component based on the property type (e.g. a DatePicker for a
DateTime, a Many2XAutocomplete for relational properties, etc).

This component also allow changing the properties definition (default
value, model, property type, etc).

Note that currently it is limited to children properties, assuming definition
is done from children to containers.

Add unit tests to ensure that behavior of the properties component is correct.

Task-2852259

Part-of: odoo/odoo#95184