Add ability to search and select a city in the visualization

[abarciauskas-bgse]

Currently you have to select a city from a dropdown. It would be a better user experience to search by and select a city.

[akinhwan]

Working on this via Algolia. Initially I will enter static json representation of the cities we are using. Algolia has other options for Indexing searchable data however that would allow us to maintain a more dynamic list of cities. Algolia has free tier for open source projects https://www.algolia.com/for-open-source but has a short application form which I could fill out? Also should I make a separate openaq login for algolia if we go this route since it should be shared access?