Use react-phone-number-input in search box

[zsoltime]

We should add react-phone-number-input to our search box so we could handle countries more easily. It converts the phone number to the E.164 format, so we could save it to our database correctly.

We should also find out how the lookup route would look like. I thought about using the country's calling code, such as +44, or alpha 2 code (GB). It could be either look like /lookup/44/0123456789 or /lookup/gb/0123456789.

It would be also great to populate the country dropdown with the user's country by default.