Workflow State Mixin, Easy add Approve workflow to any app. 快速审批工作流Mixin，用于各模块

Key features:

•  1. Easy to add workflow to any model.
•  2. Draft, To Approve, Approved, Done, Cancel flow.
•  3. Allow to approve or deny the order.
•  4. Multi-language Support.
•  5. Multi-Company Support.
•  6. Support Odoo 16, 15, 14, 13, 12, Enterprise and Community Edition