Refactor/tests (#4)

* chore(examples/react): add Chakra, MUI, react-icons deps

* feat(examples/react): add basic-ui form components and page

* feat(examples/react): add chakra-ui form components and page

* feat(examples/react): add material-ui form components and page

* refactor(examples/react): slim FormComponents to SubmitButton only

* refactor(examples/react): add tabbed app shell and Basic/Chakra/MUI routes

* Remove standalone react-chakra-ui example

* Refactor basic-ui: move ComponentRegistry, Form with schema prop, add complex form tab

* Implement Chakra UI in examples/react: ComponentRegistry, Form, inputs, containers, ChakraFormPage with tabs

* Remove shared FormComponents (SubmitButton)

* Implement Material UI: ComponentRegistry, Form, inputs, containers, MaterialFormPage with tabs, export TabPanel

* BasicFormPage: import TabPanel from MaterialFormPage

* Remove standalone react-material-ui example

* Remove ProviderExample, wrap App with ScheptaProvider (middlewares, externalContext)

* Slim Form: remove submitted-values display; basic-ui gets components from provider

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Co-authored-by: Edson Batista <edson.batista@conduent.com>

Author: guynikan