Add a `sleep(seconds)` method directly into the raw `driver`

[mdmintz]

Add a sleep(seconds) method directly into the raw driver

That way you don't need to import time to sleep().
You should just be able to do driver.sleep(seconds).

This addition is for raw driver syntax formats.
(You can already do self.sleep(seconds) or sb.sleep(seconds) for BaseCase and SB formats.)

[mdmintz]

This was resolved in 4.18.4 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.18.4