Add Messenger methods to CDP Mode

[mdmintz]

Add Messenger methods to CDP Mode

sb.cdp.activate_messenger()
sb.cdp.set_messenger_theme(theme="default", location="default")
sb.cdp.post_message(message, duration=None, pause=True, style="info")

(Already part of regular mode.)

In case people weren't aware what those methods are for... they're for posting messages to the web page for receiving live feedback.

Here's an example of a message being posted to the bottom right corner of the page:

[mdmintz]

This was resolved in 4.42.5 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.42.5