[Feature]: Add help menu when invalid command is entered

[satijapratik]

What problem or use case are you trying to solve?
The user is likely requesting a feature that provides guidance or help whenever an incorrect or unrecognized command is entered into the bot.

Describe the UX of the solution the user wants
Implement a help menu that is automatically displayed whenever an invalid command is entered to guide the users on proper commands.

User's thoughts on the technical implementation?
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Describe the alternatives considered
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Additional context
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Issue Created By: <N/A> on Slack