Support timeout opt in Playwright.visit

[s3cur3]

This allows a custom timeout for the visit action in particular, with the global timeout as the default.

[ftes]

We should add docs and import in Case.

[ftes]

Thanks Tyler 🎈

I should probably look into adding timeout option to all Playwright functions.
This will require some changes to phoenix_test in cases where an opts variant already exists that restricts the allowed keys.

Example: https://github.com/germsvel/phoenix_test/blob/3a7fa842c07e0f3bae3fc743c1e20f80ff0e1fdb/lib/phoenix_test.ex#L592

[s3cur3]

Ooh, interesting... yeah, that's tricky. 🤔