Oleg Isonen be593f7dd0 feat: Custom attributes / properties (#2912) ...

Closes https://github.com/webstudio-is/webstudio/issues/1012

## Description

I decided to just use the same control to add a custom
property/attribute, it works same way as adding style sources.

## Steps for reproduction

## Code Review

- [ ] hi @TrySound , I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [ ] made a self-review
- [ ] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [ ] tested locally and on preview environment (preview dev login:
5de6)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env.example`
and the `builder/env-check.js` if mandatory

2024-02-16 10:59:36 +01:00

..

builder

feat: Custom attributes / properties (#2912)

2024-02-16 10:59:36 +01:00