[migration]: migrate TryHackMe bot to typescript from javascript

[muhamedfazeel]

Major changes includes:

• Optimized the code for TypeScript
• Migrated all the commands and client events to TypeScript
• Added nodemon as dev dependency for easier development and testing
• Created a common configuration, where all the environment values will be fetched
• Added new health command to get health and performance statistics for the bot
• Added missing environment variables to example env
• Added validation for ENV values
• Implemented custom logger
• Added custom logs for commands which has delay than expected

NB: This is only just a proposal, please ignore if you found this not important