Add records selection context inside the command menu

[bosiraphael]

Scope & Context

Add records selection context inside the command menu.

Current behavior

No context.

Expected behavior

A record chip is displayed next to the command menu search bar when a record is selected.
When multiple records are selected, the number of selected records is displayed.
When all records are selected, 'All objectName' is displayed with the number of records.
When the user hits the backspace key when the search bar is empty, we should go back to the general command menu (ie. with no records selected)

Technical inputs

Refactor CommandMenu by extracting the search bar into a component called CommandMenuSearchBar.
Create a component named CommandMenuSearchBarContext.
If the user hits backspace when the search bar is empty, we should reset the context of the command menu.

[Bonapara]

Design when several records are selected