[COMMAND MENU ITEMS] Add engine component key (#18554)

## PR Description

In the process of migrating all the existing commands to the backend, we
stumbled across a couple of problems that made us reconsider the full
migration. This PR introduces a way for command menu items to bypass
front components and to directly reference a frontend component from
twenty front.

It:
- Introduces a `engineFrontComponentKey` field on `CommandMenuItem` as
an alternative to `frontComponentId` and `workflowVersionId`, allowing
command menu items to reference frontend components by key directly
rather than requiring a FrontComponent entity
- Updates the DB constraint to allow exactly one of `workflowVersionId`,
`frontComponentId`, or `engineFrontComponentKey`

### All standard command menu items from the frontend which use
`standardFrontComponentKey`

These are all commands that execute a GraphQL query or a mutation.
Two mains concerned have been raised that made us go with this
(temporary) architecture instead:
- If those commands are part of the standard application, they can only
alter objects from that application and not custom objects.
- We would need to implement a way to trigger optimistic rendering from
the front components, which might take some time to implement.

List:
- Create new record
- Delete (single record)
- Delete records (multiple)
- Restore record
- Restore records (multiple)
- Permanently destroy record
- Permanently destroy records (multiple)
- Add to favorites
- Remove from favorites
- Merge records
- Duplicate Dashboard
- Save Dashboard
- Save Page Layout
- Activate Workflow
- Deactivate Workflow
- Discard Draft (workflow)
- Test Workflow
- Tidy up workflow
- Duplicate Workflow
- Stop (workflow run)
- Use as draft (workflow version)

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/metadata-modules/flat-command-menu-item/constants/flat-command-menu-item-editable-properties.constant.ts

@@ -8,4 +8,5 @@ export const FLAT_COMMAND_MENU_ITEM_EDITABLE_PROPERTIES = [
   'isPinned',
   'availabilityType',
   'availabilityObjectMetadataId',
+  'engineComponentKey',
 ] as const satisfies MetadataEntityPropertyName<'commandMenuItem'>[];