## What
Adds a new custom component called `editMenuItems` that can be used in
the document view.
This options allows users to inject their own custom components into the
dropdown menu found in the document controls (the 3 dot menu), the
provided component(s) will be added below the default existing actions
(Create New, Duplicate, Delete and so on).
## Why
To increase flexibility and customization for users who wish to add
functionality to this menu. This provides a clean and consistent way to
add additional actions without needing to override or duplicate existing
UI logic.
## How
- Introduced the `editMenuItems` slot in the document controls dropdown
(three-dot menu) - in edit and preview tabs.
- Added documentation and tests to cover this new custom component
#### Testing
Use the `admin` test suite and go to the `edit menu items` collection
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