Search should support full country names as opposed to country codes

[greatislander]

Is your feature request related to a problem? Please describe.

Currently it's only possible to search for countries by two-letter country codes (e.g. UK, US, CA).

Describe the solution you'd like

Search by country name our approximate country name should be supported.

Describe alternatives you've considered

Filtering by country could also help narrow down results (see #51).

Additional context

This is not supported by the upstream library that's used in the directory. See: SmileyChris/django-countries#242. Because countries are stored in the database by country code, a data normalization step as described in SmileyChris/django-countries#242 (comment) needs to be added to support fuzzy search by country name.