ERC-1155 Balance Grid

Builds a grid of holders against token ids for a multi-token contract, using balanceOfBatch where the contract implements it so a whole row of a hundred ids becomes a single call rather than a hundred. Older contracts that only expose balanceOf fall back to reading ids individually, which is slower but still correct rather than silently returning nothing. Id sets accept lists, ranges, or a mix of both, since a real set is rarely one or the other. Ids nobody holds are hidden from the output, because a grid of five hundred empty columns is unreadable and tells you nothing, and column totals show how many of each id the whole set of holders controls between them.