Refactor main.py of step of faith bot

[nick-konovalchuk]

1. Replace user_utils.select_username_from_text with plain message.text.split()[1]
2. Merge nested if statements like here
3. Remove word "function" from all function names in the file. function_counselor_n are to be named schedule_counselor_appointment_n
4. Replace schedule_counselor_appointment_n with a single function that accepts counselor id as an argument
5. See if you can put functions directly to callback_data instead of this if-else function here. You can use functools.partial for functions that require some arguments to be fixed like schedule_counselor_appointment