Support multiple color selection / array values

[Bolkun]

First of all, thank you for this awesome package! It is simple, intuitive and works great in the Neos inspector.

I would like to suggest a feature that could make the package even more useful for data visualization use cases.

Currently, the editor stores a single color value as a string. It would be great if the editor could optionally support storing colors as an array and allow selecting multiple colors in one field.

Example use cases include:

• Chart.js datasets
• Chart labels and segments
• Multiple series in bar or line charts
• Color palettes for widgets and dashboards

For example, something like:

backgroundColors:
  type: array
  ui:
    inspector:
      editor: 'Shel.Neos.ColorPicker/ColorPickerEditor'
      editorOptions:
        multiple: true

which could result in values such as:

[
  "#aed3f2",
  "#276078",
  "#ffea0a",
  "#cdc14a"
]

An optional multiple: true mode would preserve backward compatibility while opening up many new use cases for the editor.

Thank you for considering this enhancement and for maintaining the package.

[Sebobo]

Hi, thx for your kinds words and the idea.
Sounds like a good idea, f.e. buttons or other components sometimes have a primary and secondary color which could be simplified this way. Not sure though when I will have time to do this. So if you want to give it a shot, I'm happy to review a PR.

[Bolkun]

I haven't done a deep dive into the code so far. However, implementing this myself would probably take me more time than it would take you to extend the package, since you are already familiar with the codebase and its structure.