Allow alternatives to webdriverio for browser tests

[adierkens]

As it stands now, proof mainly orchestrates tests to a storybook. There's no real reason this needs to be locked into webdriver as the runner for the browser.

Through the plugin-system, migrate the dependency on webdriver to a capability plugin, and add support for an alternative (cypress, playwright) to manage the browser session.

[pramodrhegde]

@adierkens I would like contribute here, can you please assign this to me?

[veenadesai]

@adierkens I would like to add cypress support.

[adierkens]

Feel free to open a PR