Allow control type specific custom classes

**Describe the feature**
At the moment it's not possible to define custom classes per control type. They can only be defined for all controls or via the ui schema for a single control.

**Describe the solution you'd like**
It would be nice when custom classes could be defined per control type, i.e. `number`, `integer`, `string`, `array` etc.

**Describe for which setup you like to have the improvement**
Framework: [Vue]
RendererSet: [Vanilla]

**Additional context**
Could also be implemented for the React Vanilla renderer set