[FR] SalesOrderAllocation is not available from python API

[xlfds]

Problem statement

I want to get SalesOrderAllocation from python API.
I use pip package inventree==0.23.0.

Suggested solution

Add SalesOrderAllocation to python API.

[SchrodingersGat]

@xlfds would you be able to submit a PR for this? Otherwise might not get to it soon

[xlfds]

I was looking around code and I found that it was implement already. But it not possible import as from inventree.order import * yet.