Add collection item fields

[doneill]

Description

Collection item fields now get their full UI properties based on their type definitions in schema.ui.fields

Fixes

#28

Proposed Changes

• Added optional schema parameter to createControl to access UI field definitions
• Updated generateCollectionUISchemaInternal
  • Looks up UI field definitions for each collection item field in schema.ui.fields
  • Uses the main createControl function recursively instead of basic helper
• generateUISchema Passes schema to createControl

Testing

• Run yarn test
  • Verify all tests pass
• Build and link library in React Native app

# build
npm run build

# link
yarn link

# In React Native client app, e.g. EarthRanger
yarn remove @earthranger/react-native-jsonforms-formatter@2.0.0-beta.8
yarn link @earthranger/react-native-jsonforms-formatter@2.0.0-beta.8