Implement HTML component and cleanup Text component

[Skaiir]

Instead of maintaining our own sanitation code, we can just use DOMPurify. I don't really trust our own code from being purely safe from all injections, and we're also restricting people from doing a lot of stuff in their text-fields, like styling which has been requested a few times.

I've also removed our dependency on preact-markup because I found it hard to justify, at the end of the day it was just doing dangerouslySetHtml with extra steps.

Closes #642
Closes #1004
Closes #1010

Bugs

Html component content isn't considered in getSchemaVariables

[Skaiir]

[Skaiir]

I added a few things since:

• escaping html and css characters from template injection sites, to avoid unlikely but theoretically possible clickjacking attacks
• allowing style tags, but forcing them into a scope via DOM modifications (this one is mostly just a tryout, happy to remove it if we don't like it)
• schema changes (thanks @vsgoulart for the reminder)
• minor style changes

Deployment: https://demo-642-relax-text-component--camunda-form-playground.netlify.app/

[Skaiir]

Will cleanup the commits a little before I merge :)

[vsgoulart]

@Skaiir I think you need to update the build config to handle dompurify:

[vite]: Rollup failed to resolve import "dompurify" from "/Users/vinicius/repos/tasklist/client/node_modules/@bpmn-io/form-js-viewer/dist/index.es.js".
This is most likely unintended because it can break your application at runtime.
If you do want to externalize this module explicitly add it to
`build.rollupOptions.external`

[vsgoulart]

This breaks if we use native CSS nesting

[vsgoulart]

For example, this valid CSS:

* {
  color: red;
  & h1 {
    color: blue;
  }
}

becomes this:

#fjs-form-0w50k6a-Field_0pv8mat-style-scope * { 
  color: red;
  & h1 }}

[Skaiir]

Pushed a new version of the CSS magic, with some decent test coverage.

[Skaiir]

It's the only change I actually made, the rest is just squashing / reordering some stuff.

[vsgoulart]

I thought we didn't use switches 😅

[Skaiir]

Yeah, a map's better here anyways :)

Though an if else + would be insane :D