Add fees attribute to `Order` object

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Is your feature request related to a problem? Please describe.

Yes I'd like to see how much I'm paying in fees for crypto trading. Since volume is a factor and maker/taker, it is complex to know how much I paid in fees.

### Describe the solution you'd like.

add `fees` attribute to `Order` object.

### Describe an alternate solution.

_No response_

### Anything else? (Additional Context)

_No response_