Add a right_click() / context_click() method to the APIs

[mdmintz]

Add a right_click() / context_click() method to the APIs.

Some websites have context menus that are accessible via right-click. SeleniumBase should have its own method for performing that right-click to open a context menu.

SeleniumBase should add these two methods, which should perform the same action:

self.context_click(selector, by="css selector", timeout=None)

self.right_click(selector, by="css selector", timeout=None)

[mdmintz]

Released in 4.11.0 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.11.0