FormContext - Add context for Form to manage input state

[jpuzz0]

Is this a new component or an extension of an existing one?
This is a new component for providing Context to a Form, FormContextProvider.

Describe the feature
As a developer, I would like to be able to track input values, errors, validation, and what is touched in a Form by offering a central location for this state by way of context.

Any other information?

• This context will be usable independently of the Form component for now, but the intention is to also modify Form (Wrap Form in a FormContextProvider) and FormGroup to utilize this context so that setters and getters won't have to be called manually.
• This is the first step towards a home-grown solution to form state management for Patternfly.

[stale]

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