Add takerQty and makerQty Properties to Orders, Replacing isMaker Flag

[fasenderos]

This pull request introduces two new properties, takerQty and makerQty, to the limit order object. These properties provide a more detailed breakdown of the executed quantities of an order, allowing us to distinguish between the parts of the order that acted as a "taker" and those that acted as a "maker".

Previously, the order object included a boolean flag isMaker, which was set to true only if the order was completely a maker order. This approach did not account for partially executed orders, where part of the order could be a maker and part a taker.

The sum of takerQty and makerQty will always equal the original size of the order. This can be used to determine if the order was completely a taker, completely a maker, or a combination of both.

Breaking Changes

• The isMaker property has been removed from the limit order object.
• New properties takerQty and makerQty have been added to the limit order objecct.