[WIP] Futures API: Market

[AlexApps99]

I've tried to base it off of the regular Market API, most functionality is unimplemented currently and there is no testing/examples/docs.

TODO:

• [x] Skeleton, setup, etc
• [ ] All functionality implemented
• [ ] All functionality tested/given examples
• [ ] Documentation

[AlexApps99]

I don't think I will have the time to add much more, I hope this is enough for now and the rest can be added later

[wisespace-io]

@AlexApps99 Thank you for the great contribution. It can be added gradually, it is even better.