Handle 'word not found'

Currently, it will load the nearest word to the search term. Change this behaviour to bring up a list of nearest words, and ask to load the definition for one of them instead.
Are we guaranteed that `resp.data` will always be non-empty? If we can then this'll work, if not, we will need to handle that (to avoid an error being thrown when we look up `.word` off of `resp.data[0]`, which evaluates to `undefined` if `resp.data` is empty).