Improve REPL support

[mxschmitt]

Currently the users have to heavily rely on indentation by using the context manager or using some hacky approach like that:

from playwright import sync_playwright

pw_context = sync_playwright()
p = pw_context.__enter__()

browser = p.chromium.launch()
page = browser.newPage()

def log_and_continue_request(route, request):
    print(request.url)
    route.continue_()

# Log and continue all network requests
page.route('**', lambda route, request: log_and_continue_request(route, request))

page.goto('http://todomvc.com')
browser.close()
pw_context.__exit__(None, None, None)

Probably we should add helper functions as aliases for the duner methods.

Reported via Reddit: https://www.reddit.com/r/Python/comments/i4z17w/playwright_a_python_library_to_automate_chromium/g0pb8qp?utm_source=share&utm_medium=web2x

[pavelfeldman]

Is there a way to make start implicit?

import playwright

playwright.chromium.launch()  # playwright.chromium launches the driver in the blocking manner
# ...
playwright.close()