device-request.md: Add more guidance and hints; use comments and headings
device-request.md: Add more guidance and hints; use comments and headings

dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin,dresden-elektronik/deconz-rest-plugin