Add Configurable Logging Level to Bot Configuration

[Leviaria]

Description

This pull request introduces a new configuration section bot: in the config.yaml file, allowing users to set the logging level for the bot. The log_level parameter can be configured to control the verbosity of log messages, with options such as "DEBUG", "INFO", "WARNING", "ERROR", and "CRITICAL". The logging configuration has been implemented across main.py, custom_bot.py, and emulator.py to ensure consistent logging behavior throughout the application.

Changes

• Added bot: section with log_level parameter in config.yaml
• Updated main.py to read and apply the log_level configuration
• Modified custom_bot.py and emulator.py to use the configured logging level
• Included appropriate import statements for sys in relevant files