Error handling when failed to connect

[hengmengsroin]

This pull request includes several changes to the WebUSBReceiptPrinter class in the src/main.js file to improve error handling and return consistency. The most important changes include adding return values to indicate success or failure, wrapping the #open method in a try-catch block, and commenting out the device reset operation.

Error handling improvements:

• Added return values to indicate success or failure in the connect method.
• Wrapped the #open method in a try-catch block to handle potential errors and added return values to indicate success or failure. [1] [2]

Codebase simplification:

• Commented out the device reset operation in the #open method to avoid potential issues during the connection process.