[ Feat ]: Revoke rights for a certain user

[brf153]

closes #79

Steps I have taken:

1. Created a new command to revoke user rights.
2. Implemented the /whiteboard deny {userName} of {boardName} command for this purpose.
3. Extracted userName and boardName from the context parameters.
4. Developed a new function to remove the specified userName from the boardOwner of the given board.
5. Updated the board using the storeBoardData function.
6. Sent a message to the board owner, notifying them that {userName} has been removed from the rights of {boardName}.

[brf153]

https://github.com/RocketChat/Apps.Whiteboard/assets/107868772/72f66447-9d59-4cbb-b4c3-158cc6f9e0b8

[CulturalProfessor]

hey @brf153 I think after your recent pr of permission I think we are not able to modify board name etc , please look into it

[brf153]

@CulturalProfessor its working in my system

https://github.com/RocketChat/Apps.Whiteboard/assets/107868772/33d4c608-9759-46fb-be1b-eb5155b43565

[brf153]

https://github.com/RocketChat/Apps.Whiteboard/assets/107868772/dd5bc02b-86ad-4798-a484-69afa0ffdb41

[CulturalProfessor]

can you try after taking a pull it might be due to @Giridharan002 's pr

[brf153]

@CulturalProfessor oki I will check it