Refactor Evolution Channel with new instance management and media handling 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.

Author: DavidsonGomes