Add ability to run JS scripts during archiving with Playwright/Puppeteer

[pirate]

https://github.com/GoogleChrome/puppeteer is fantastic for scripting actions on pages before making a screenshot or PDF.

I could add support for custom puppeteer scripts for certain urls that need a user action to be performed before archiving (e.g. logging in or closing a welcome message popup).

Puppeteer code looks like this:

        const browser = await puppeteer.launch({headless: false})
        const page = await browser.newPage()

        await page.goto('https://carbon.now.sh')

        const code_input = 'div.ReactCodeMirror div.CodeMirror-code > pre:nth-child(11)'
        await page.click(code_input)
        await page.keyboard.down('Meta')
        await page.keyboard.down('a')
        await page.keyboard.up('a')
        await page.keyboard.up('Meta')
        await page.keyboard.press('Backspace')

[pirate]

Would go well with: https://github.com/checkly/puppeteer-recorder

[FiloSottile]

archive.is has a nice set of scripts that do things like expanding all Reddit threads or scrolling through Twitter timelines before taking a snapshot. This is the kind of thing I've seen develop a nice community around with youtube-dl.

[pirate]

The beginnings of this will start to be implemented with our move from chromium-browser to pyppeteer playwright: #177, then these will be possible:

• support for scripted user flows (this ticket)
• dismissing gdpr / cookie / subscription / donation popups automatically: Dismiss cookie permission, GDPR, and subscription popups before archiving #175
• autoscroll before archiving with full-page dynamic height screenshots: Autoscroll before before archiving and take full-height screenshots #80
• dynamic/interactive requests saving into the WARC with pypetteer running through pywb: Extend WARC file with all requests made via all archive methods #130