Update template selection shape

[darenkeck-dev]

Currently when a user makes a selection it is stored in a dictionary with the value as a primitive.

type SelectionDictionary = {
    [key: string]: string | number | boolean
}

Expand the value to be an object in preparation for additional fields that will be added to contextualize the selection.

type NewSelectionDictionary = {
    [key: string]: { value: string | number | boolean }
}