Add Coin Section - Search Algorithm Implementation

[x] Currently, there is no way of seeing possible valid coins when users enter coin names into the textfield.
[x] Is there a way of seeing list of coins that matches user entry ?
[x] As user types in, list of suggested coins should update.
[x] Any suggested coin should be selectable.
[x] Every user entry will trigger api call if we dont optimize it. ( can we pre-fetch list of coins and implement client-side search functionality ? )

tahackr / coin-tracker