Support projections of associated/composed field values in parent entity list

[SvyatovetsD]

Currently values of associated/composed items can be easily accessed with customising gql query, but there's no way to reference these values in data table.

Ideal use case would be to set them in columnDefinitions string array as '[parentEntityFieldKey].[embeddedEntityFieldKey]' or at least to have ability to customise field value accessor, field renderer and field title for these kind of fields