Refactor Evolution Channel with new instance management and media han…

…dling features

- Added `setInstance` method to manage instance details and trigger events for instance creation.
- Refactored `connectToWhatsapp` to improve error handling and streamline connection logic.
- Enhanced `sendMessageWithTyping` to support various message types including buttons and lists, and integrated file handling for media messages.
- Updated `processAudio` to handle audio conversion using an external API, improving audio processing capabilities.
- Introduced new methods for sending button messages and handling audio messages, enhancing user interaction features.
- Improved contact update logic to ensure accurate data synchronization with the database and external services.