Implementation plan

• Create a new elasticstack_kibana_default_data_view resource
• Use set default data view and get default data view API operations.
• The resource should define data_view_id, force, and skip_delete attributes in it's schema. If skip_delete is true then the Delete operation should be a no-op, leaving the existing default data view unchanged.
• Add acceptance tests covering the resource behaviour. Use the existing elasticstack_kibana_data_view resource to create data views for testing.
• Ensure you follow the Copilot instructions at all times.

Is your feature request related to a problem? Please describe.
When I have many data views, and I'd like to set only one as a default one.
It's visible in Kibana, in Data view, view:

Describe the resource you would like to have implemented.
To be able to manage Kibana automatically, the way I could manually. In case I have a lot of Spaces and DataViews.

Describe the solution you'd like

resource "elasticstack_kibana_data_view" "name" {
  data_view = {
    ...
    default = true
  }
}

Describe alternatives you've considered
REST API Call?

Additional context
Attached screenshot