Update flags to showSuggestionsWhileTyping and showResultsWhiletyping

[thaddmt]

• Updated to have two flags showSuggestionsWhileTyping and showResultsWhileTyping
• Default behavior when a suggestion API is passed in will be
  • showSuggestionsWhileTyping defaults true
  • showResultsWhileTyping defaults false
  • Enter zooms around search results
• showSuggestionsWhileTyping false and showResultsWhileTyping false
  • Enter zooms around search results, no suggestions API calls made
• showSuggestionsWhileTyping false and showResultsWhileTyping true
  • Calls search API while typing
  • Enter zooms around search results, no suggestions API calls made
• showSuggestionsWhileTyping true and showResultsWhileTyping false
  • Calls suggestions API while typing
  • Enter calls search API, zooms around search results
• showSuggestionsWhileTyping true and showResultsWhileTyping true
  • Calls suggestions and search API while typing
  • Enter calls search API ONLY with current typed out value, does not zoom around search results

Quip doc with gifs - https://quip-amazon.com/qdvRAuas7Kl0/MapLibre-Geocoder-Behaviors-v2

• [x] briefly describe the changes in this PR
• [x] write tests for all new functionality
• [ ] run npm run docs and commit changes to API.md
• [ ] update CHANGELOG.md with changes under master heading before merging