Implement /dice command

[tanamaroby]

Issue Title: Implement /dice Command

Issue Description: As a user of our Discord bot, I want to be able to use a "/dice" command to roll a six-sided die and receive a random number between 1 and 6, so that I can use it for various games or activities within Discord.

Feature Description:

• The "/dice" command should take no arguments.
• When invoked, the bot should simulate rolling a six-sided die and generate a random number between 1 and 6.
• The bot should respond with the randomly generated number.

Acceptance Criteria:

• The "/dice" command is successfully implemented and tested.
• Invoking the "/dice" command should result in the bot generating and displaying a random number between 1 and 6.
• The bot's response should include the randomly generated number.

Additional Notes:

• This feature will provide users with a fun way to roll a virtual die within Discord for games or activities.
• Please ensure thorough testing of the "/dice" command functionality before closing this issue.