✅ Command start : Welcome to user by user's first name
✅ Command game : Number guessing game
✅ Command age : Receive the date of birth in solar Hijri and calculate the age
✅ Command voice : Receive a sentence in English from the user and send it as a voice
✅ Command max : Receive an array from the user and send the largest value
✅ Command argmax : Receive an array from the user and send the index of the largest value
✅ Command qrcode : Receive a string from the user and generate a qrcode
✅ Command help : Show commands list