New Feature: Decoration(prefix/suffix) text of players' id

Please add this feature: decoration(prefix/suffix) text of players' id that can be edited by command and be show in JSON text(ex: /tellraw, /title, books etc.).
Details:

• A new command like /iddecoration <prefix|suffix> [text...]
  • If the text isn't entered, the decoration will be cleared.
• 2 tags of JSON text with type of string to show players' decoration text like "prefix":"@p" and "suffix":"@p"