feat: Proxy authentication

[abdullahercan]

Pull Request: Feat: Added Proxy Authentication

Changes proposed in this pull request:

• Added support for proxy authentication when connecting to the repository using wppconnect.
• Proxy configuration includes:
  • Proxy URL
  • Username for authentication
  • Password for authentication
• Updated the connection flow to support proxy configuration as part of the .create() method in wppconnect.

Example Usage:

wppconnect
  .create({
    proxy: {
      url: 'http://proxy.example.com',
      username: 'username',
      password: 'password',
    },
  })
  .then((client) => start(client))
  .catch((error) => {
    console.log(error);
  });

This new functionality allows users to connect to the repository through a secure proxy, enabling better access control and security in environments requiring a proxy connection. The provided example demonstrates how to configure and use the proxy within the application.