Configuration API extension

[Dayver]

• [ ] It is necessary to add the ability to set configurations not only for the core and extensions, but also for individual entities. For example, in addition to its global configurations, the plugin would also have those that belong to its individual parts, so that when parts of the plugin are disabled, the configurations of these parts are hidden from the settings section
• [ ] Configurations attached to the entities with which a particular module or plugin works. Using the user module as an example, any group could be given its own set of configurations, or other example as in ticket #1037