fix: format every first letter to capital case for city names.

[julioqui]

Currently, our app differs capital case and small case on city inputs. For example, for the following inputs "Tokyo" and "tokyo", we would have two different cities in the searchbar. "ToKyo" would generate a third search input.

In the examples above, the app should be able to recognize capital and small cases and format it to properly show "Tokyo", so that the searchbar only shows one result for it.