Add --timeout option

[palewire]

Crafted this little add while exploring #46

[simonw]

I hadn't seen this option before: https://playwright.dev/python/docs/api/class-browsercontext#browser-context-set-default-timeout

This setting will change the default maximum time for all the methods accepting timeout option.

It looks like .screenshot() is indeed one of those methods: https://playwright.dev/python/docs/api/class-page#page-screenshot

• timeout <float> Maximum time in milliseconds, defaults to 30 seconds, pass 0 to disable timeout. The default value can be changed by using the browser_context.set_default_timeout(timeout) or page.set_default_timeout(timeout) methods.

I hadn't realized screenshot had a default of 30 seconds already, that's useful to know.

[palewire]

It would be nice to work this in. I think it could also help clarify that wait is for after the page loads.

[palewire]

Hitting 30 second timeouts on some lower quality websites. Not sure if the option to let them wait longer before timing out would fix my problem, but I'd advocate for this PR so I can give it a try.

https://github.com/palewire/news-homepages/runs/5692715786?check_suite_focus=true