add optional fields in public user endpoint

[jalpp]

solves #159 adding optional fields in description and linking required faq/TOS URLs to better understand the API sample

[fitztrev]

Would it be better to add these to the schemas as property descriptions?

   disabled:
     type: boolean
     example: false
+    description: Only appears if a user's account is closed

[jalpp]

Would it be better to add these to the schemas as property descriptions?

   disabled:

     type: boolean

     example: false

+    description: Only appears if a user's account is closed

Oh yes! 😅 I'm used to readme format, I will add that and re create the PR! Thanks