Add subregions to input

[metalwarrior665]

Currently, we only support the country. But Google Trends allows also to hit the arrow there to choose a subregion. It is not realistic to get all subregions into the schema so instead, we should have a free geo field, e.g. US-NJ.

Let's make it dumb-proof so if the user adds a country to subregion, we will use it, otherwise use country + subregion or smthing like that