feat(surveys): preact surveys components

[liyiy]

Changes

Converts surveys into components

How to manually test:

1. Follow the instructions for linking this version of posthog-js to your main posthog branch https://github.com/PostHog/posthog-js?tab=readme-ov-file#developing-together-with-another-project

2. Test any and all flows including:

• All survey types
• Single and multiple choice open ended select
• Multiple question surveys
• Customization with colors, branding, html in description, etc.
• Survey results look correct
• Feedback tab and custom selector widget

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers

[github-actions]

Size Change: +15.9 kB (+2%)

Total Size: 860 kB

Filename	Size	Change
dist/array.full.js	183 kB	+134 B (0%)
dist/array.js	124 kB	+131 B (0%)
dist/es.js	124 kB	+131 B (0%)
dist/module.js	125 kB	+131 B (0%)
dist/surveys.js	64.3 kB	+15.4 kB (+32%)	🚨

ℹ️ View Unchanged

Filename	Size
dist/exception-autocapture.js	12 kB
dist/recorder-v2.js	105 kB
dist/recorder.js	58.6 kB
dist/surveys.esm.js	64.2 kB

_{compressed-size-action}

[liyiy]

I added a bunch of e2e tests and also manually went through the flows, but would very much appreciate a second or third look from others! 🙏

[neilkakkar]

Great job adding all the e2e tests! 🚀

Suggestion: Split e2e tests into a separate PR, merge it first, so we can confirm they work well with both the old and new code

[benjackwhite]

Bunch of comments, mostly about code quality rather than the functionality itself. I think its worth the extra effort to make this a little tidier now (otherwise it will likely not happen 🙈 )

[liyiy]

Thanks @benjackwhite for the thorough review. I've either added in the fixes or left the less urgent ones as TODOs. Let me know if I've missed anything !

[benjackwhite]

This is much nicer! Easy to review, easy to see how one would make changes later. This was definitely worth the extra investment from my perspective.

Haven't tested the functionality itself - I would watch this like a hawk after it gets merged and ensure that there are no surprises...

[neilkakkar]

🚀