Render template and support component operations in preview canvas

This MR can get started on by starting work on top of MR #1 3541027-create-new-templates from ✨ Create new Templates menu Active .

1. Import this config to create a content template that will then show up in the left sidebar menu on the branch's MR. Then that template can be used as an entry point to open the template layout in the editor frame which is the work of this issue. The frontend will need to construct the URL to get the template layout using the suggestedPreviewEntityId from /canvas/api/v0/config/content_template/

/admin/config/development/configuration/single/import

uuid: 963372a4-3ebb-46c9-8ae5-e3a27b5e5e97
langcode: en
status: false
dependencies:
  config:
    - canvas.component.sdc.canvas_test_sdc.my-cta
    - core.entity_view_mode.node.full
id: node.article.full
content_entity_type_id: node
content_entity_type_bundle: article
content_entity_type_view_mode: full
component_tree:
  -
    uuid: 435d1d20-a697-4d36-9892-9d61c825c99c
    component_id: sdc.canvas_test_sdc.my-cta
    component_version: 53ed322c96bee384
    inputs: '{"text":"This is really tricky for a first-timer","href":{"sourceType":"static:field_item:uri","value":"https:\/\/drupal.org","expression":"\u2139\ufe0euri\u241fvalue"}}'
    label: yo
exposed_slots: {  }

jessebaker → closed merge request !1508

I added the ability to change the layout in the editor frame (add, remove, re-order components). Also regarding the content template config from #15, the call to action component is invalid, so u can remove it if you want or just ignore it and add other ones.

I think other issues can build on top of this MR now that the component actions are working in the editor frame.

But this issue still needs #4 and #5 from the issue summary to be done and also cleanup