Get Token Holders Query #376

Can we please get a function/query to retrieve the total number of token holders for a CW20 or bank token.

Similar to how the explorer displays the total number of token holders.
Additional benefit would be to have the optionality to retrieve the number of holders with amount X above, and/or amount X below.

Another query to retrieve the list of the token holders, their address and amounts would be good as well, with pagination options.