Updated command section - ban/unban

TPA ban and unban commands implemented.
TPA ban <player>
- if player not banned; ban return message
- if player banned; return message
TPA unban <player>
- if player banned; unban, return message
- if player unbanned; return message
Revert "Updated command section - ban/unban"

This reverts commit 72720e11f086d9fff6080a68f8cc19fb16ded7d8.