Create new unit workflow

[jmakowski1123]

From the Library homepage, Users click on the "create new button" and see a button for "Units" in the content list dropdown.

When users click the "unit" button, the new unit page is created.
Note: There is no confirmation needed, the unit page is automatically created.

[sdaitzman]

The create and populate unit workflow is represented in Figma here pending #1607 and #1608

In scope

• Add Unit as an option when the user clicks the Add Content button

• Creating a new unit, which now exists in the library
• Navigation to new unit, with no confirmation (pending bare-bones unit full-page view)

Not in scope

• Importing an existing unit
• Deleting a unit
• Editing a unit
• Content inside a unit