New feature: Display profile configuration

config/schema/hm_display_profile.schema.yml

hierarchy_manager.libraries.yml

hierarchy_manager.module

js/Plugin/jsoneditor/hm.jsoneditor.js

js/Plugin/jstree/hm.jstree.js

src/Entity/HmDisplayProfile.php

src/Form/HmDisplayProfileForm.php

src/Form/HmOverviewTerms.php

src/Plugin/HmDisplayPlugin/HmDisplayJstree.php