Add property to hide colors/swatches from icon picker

[bjarnef]

I had a look at reusing Umb.PropertyEditorUi.IconPicker as property editor wrapping inside a custom component as it isn't directly available as property editor: #20632

However it doesn't seem to be that easy (and maybe just the lack of my knowledge for now):
https://forum.umbraco.com/t/re-use-icon-picker-property-editor/6455

And since the umb- property editor ui components are not exported.

It works however copying most of this inside my own component:
https://github.com/umbraco/Umbraco-CMS/blob/8434c7d0cbf919532be72e0c86bfed5a3af66877/src/Umbraco.Web.UI.Client/src/packages/property-editors/icon-picker/property-editor-ui-icon-picker.element.ts

It seems the data property is not available yet (but in v17, and in v16.4 I guess):

Umbraco-CMS/src/Umbraco.Web.UI.Client/src/packages/core/icon-registry/icon-picker-modal/icon-picker-modal.token.ts

Lines 3 to 6 in e893682

	export interface UmbIconPickerModalData {
	placeholder?: string;
	showEmptyOption?: boolean;
	}

However in v13 I recall it was possible to hide swatches/colors from model.
It seems to be an oversight that this feature hasn't been implemented in the new backoffice: #13079

This will be useful, when one just want a icon picker and color doesn't matter (as styled in frontend anyway).

Perhaps also an filter function or similar, e.g. to filter icons by prefix? That way it would be possible to only show icons from a specific icon pack (although all icons may be shown in default icon picker used for content type icons).

For example if using Iconoir icon pack by @warrenbuckley in a custom property editor UI for a specific block one don't want e.g. Lucide icons + social icons from simple icons to show up in this picker:
https://marketplace.umbraco.com/package/umbraco.community.iconpack.iconoir

Although most probably just want neutral/black icons here, it would be useful if we even can configure swatches for the project brand colors.

For this specific project we have specific brand colors:
umbraco/Umbraco.UI#653

We can solve this just styling the icons in frontend (or a separate setting for icon color), but in this case it would make sense if the custom can select icon color as well :)