Converted the fields to Typescript

[heath-freenome]

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Reasons for making this change

• Updated the @rjsf/utils types and functions based on necessary changes needed for the conversion as follows:
  • In types.ts some improvements and new types were discovered as follows:
    • Modified the RJSFSchema to add the non-standard enumNames property onto the JSONSchema7 to support the Fields
    • Added a new EnumOptionsType required for some of the fields
    • Added a new UnsupportedFieldProps type for the new UnsupportedFieldTemplate on TemplatesType
    • Removed the fields property on FieldTemplateProps since that data can be easily obtained from the registry
    • Added the rawErrors property to ArrayFieldTemplateProps since it was needed ArrayField
    • Added the missing T generic on a few uses of IdSchema properties on a few types
    • Updated the WidgetProps type to combine the options property with an additional, optional enumOptions property as needed by widgets
    • Updated the UIOptionsBaseType to have it combined with the TemplatesType making it require the T and F generics as well as adding the following new properties:
      • classNames was added as a breaking change (it used to simply be classNames in UiSchema but now it will be ui:classNames or ui:options: { classNames }
        • This makes classNames consistent with all the other ui options
      • orderable and removable were added to support the ArrayField
      • widget was added to support many of the Fields
    • Updated UIOptionsType to also take the T and F generics
    • Updated SchemaUtilsType.retrieveSchema() to make the formData parameter optional, like it already is on the wrapped function
  • Updated the getUiOptions() function to add the T and F generics to the return value type
  • Updated getWidget() to make the widget property optional, updating the tests accordingly
  • Updated isCustomWidget() to make uiSchema default to an empty object if missing, updating the tests accordingly
  • Updated optionsList to remove the enumNames hack and to return the new EnumOptionsType[] | undefined type
• Updated FieldTemplate for antd to remove the commented out fields variable since it was removed from the FieldTemplateProps
• Refactored ArrayField.js to ArrayField.tsx converting things to typescript
  • Made the FieldProps use the T[] generic based on the ArrayField's T generic since formData should always be an array
  • There were many places where type safety checks were required along with custom casts to deal with T vs T[] issues
  • Exported ArrayField cast as a Field to allow it to be used properly in the index.ts
• Refactored BooleanField.js to BooleanField.tsx converting things to typescript
• Refactored MultiSchemaField.js to MultiSchemaField.tsx converting things to typescript
• Refactored NullField.js to NullField.tsx converting things to typescript
• Refactored NumberField.js to NumberField.tsx converting things to typescript as well as making it a stateless functional component with useState() instead of a class
• Refactored ObjectField.js to ObjectField.tsx converting things to typescript
• Refactored SchemaField.js to SchemaField.tsx converting things to typescript
  • Updated the code to deal with the classNames now coming from ui: options, including updating tests accordingly adding a new one for the new case inside of ui:options
• Refactored StringField.js to StringField.tsx converting things to typescript
• Refactored fields/index.js to fields/index.ts adding the proper type for the returned object
• Updated ArrayFieldTemplate to add the missing T and F generics required for getUiOptions()
• Updated ObjectFieldTemplate to add the T and F generics onto getUiOptions()
• Refactored fields/UnsupportedField.js to templates/UnsupportedField.tsx converting things to typescript
  • Added this to templates/index.ts as UnsupportedFieldTemplate
  • Also updated tests to use templates.UnsupportedFieldTemplate instead of fields.UnsupportedField
• Updated getDefaultRegistry() to remove the cast on fields since they are now properly typed

NOTE: This PR is stacked on top of #3001, but will be rebased once it merges

Checklist

• [ ] I'm updating documentation
  • [ ] I've checked the rendering of the Markdown text I've added
• [x] I'm adding or updating code
  • [x] I've added and/or updated tests. I've run npm run test:update to update snapshots, if needed.
  • [ ] I've updated docs if needed
  • [ ] I've updated the changelog with a description of the PR
• [ ] I'm adding a new feature
  • [ ] I've updated the playground with an example use of the feature