Block Editor Tools: New `TermCheckboxes` component

[renatonascalves]

Description

We need to create TermCheckboxes components from time to time in our projects to mimic the core behavior but for a specific/custom taxonomy.

We have some prior art here and here.

Use Case

A TermCheckboxes (or with a similar name) component is created. Ideally, it uses core functionality, not a custom REST API endpoint.

<TaxonomyCheckboxes
  taxonomy="mytaxonomy"
  selectedItems={termIds || slugs}
  onChange...
/>