Theme block type (preset) completion

[charlespwd]

In theme and section block presets. We should complete block types.

In sections

• if section defines local blocks,
  • complete local block types
• if section accepts @theme
  • complete theme blocks
• If section accepts specific theme blocks
  • complete specific theme blocks

In blocks

• if block accepts @theme
  • complete theme blocks
• if block accepts specific theme blocks
  • complete specific theme blocks

{% schema %}
{
  "name": "Header Announcement",
  "blocks": [{ "type": "slide" }, { "type": "other-slide" }],
  "settings": [],
  "presets": [
    {
      "name": "Header Announcement",
      "blocks": [
        {
          "type": "█", // <-- should complete "slide", "other-slide"
        },
        {
          "type": "slide",
          "blocks": [
            { "type": "█"} // <-- should complete what slide accepts
          ]
        },
       {
          "type": "other-slide",
          "blocks": [
            { "type": "█"} // <-- should complete what other-slide accepts
          ]
        },
      ]
    }
  ]
}
{% endschema %}