/user command that gives details of a user

[j24m]

Issue Ticket

• https://github.com/Real-Dev-Squad/discord-slash-commands/issues/106

  PR :

• To be checked along with this feature :
  https://github.com/Real-Dev-Squad/website-backend/pull/1457

  Description

• This pull request introduces a new discord slash command /user which takes as an argument username and provides details of that user.
• Issue Ticket : https://github.com/Real-Dev-Squad/discord-slash-commands/issues/106
• When this command is executed, it returns the following details of the user :

##  Jyotsna's Details

   **Full Name :** Jyotsna Mehta
   **RDS Discord Joined At :** 31/05/2023 18:17:08
   **State :** IDLE

Test Coverage Stats :