Update README.MD

[fipro78]

• Changed the configuration json indentation to be better aligned
• Added tables with information about the configuration options (feel free to extend it with more meaningful information)
• Removed the @RequireJakartarsWhiteboard information, as it is not necessary. Actually the @JakartarsResource annotation itself has the @RequireJakartarsWhiteboard, so the requirement to the Jakarta REST Whiteboard implementation is implicitly applied when using @JakartarsResource.

[maho7791]

LTM Thanks for the contribution