[Chore] Read-only state for form fields

[kpmurphh]

What general chore or task would you like to see performed?

Describe the bug
A read-only state is needed for form fields - text fields, selects, typeaheads, textareas, multiselect, etc. (Excludes selection controls)

The read only state styling is as follows:

• The text color is #313536
• The background and border color of the input area are the same as the disabled state.