enhancement: add divider to custom list (custom controls)

[Paul-Bob]

Description

Fixes #3297

Related PR

https://github.com/avo-hq/avo-advanced/pull/51

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
  • add divider on custom list docs.avohq.io#309
• I have added tests that prove my fix is effective or that my feature works

Screenshots & recording

self.index_controls = -> do
  action Avo::Actions::ReleaseFish

  list label: "Custom Index List", icon: "heroicons/outline/cube-transparent", style: :primary, color: :slate, title: "A custom list" do
    link_to "Google", "https://google.com", icon: "heroicons/outline/academic-cap"
    divider label: "↓ Action ↓"
    action Avo::Actions::Sub::DummyAction, icon: "heroicons/outline/globe"
    divider
    link_to "Fish.com", "https://fish.com", icon: "heroicons/outline/fire", target: :_blank
    link_to "Avo", "https://avohq.io/", target: :_blank
  end
end

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[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

Please check the release guide for more information.