### Summary

This PR creates the bulk functionality of the exception builder. The exception builder is the component that will be used to create exception list items. It does not deal with the actual API creation/deletion/update of exceptions, it does contain an `onChange` handler that can be used to access the exceptions. The builder is able to:

- accept `ExceptionListItem` and render them correctly
- allow user to add exception list item and exception list item entries
- accept an `indexPattern` and use it to fetch relevant field and autocomplete field values
- disable `Or` button if user is only allowed to edit/add to exception list item (not add additional exception list items)
- displays `Add new exception` button if no exception items exist
    - An exception item can be created without entries, the `add new exception` button will show in the case that an exception list contains exception list item(s) with an empty `entries` array (as long as there is one exception list item with an item in `entries`, button does not show)
- debounces field value autocomplete searches
- bubble up exceptions to parent component, stripping out any empty entries