docs(plugins/Data): add documentation
docs(plugins/Data): add documentation

Related to CAM-1558

TitanUser/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,nagyistoce/camunda-cockpit-ui,tcrossland/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,nagyistoce/camunda-cockpit-ui