Possibility of parsing out the results into usable location values

Hey there!

I stumbled across a very similar issue where I needed the lat & long coordinates as value for the field. I think, a nice solution for this would be to add an option for a custom format, using the places object given by the API.

I added a new output_format setting to the field formatter. This way we can use JS template literals to format the resulting value as desired.

What do you think, could that be a useful feature?