Change Parameters/items to refer to parameter definition

[sdwheeler]

Change Parameters/items to refer to parameter definition.

Before this PR, the definition for command in the schema included details for parameter items. It was a duplicate definition, but it was missing some properties defined in parameter. There was also an error in the descriptions of the Name and OriginalName properties of a parameter.

Added a new schema version 2024-05 where:

• Changed the command/items property to reference the parameter definition
• Fixed the property descriptions