post https://api.bewe.io/v1/budgets/
Creates a new budget in the system using the provided details.
The request body must include the client, items (products or treatments), and the commerce ID. Upon successful creation, the endpoint returns the newly created budget with all calculated fields, such as total amount, taxes, discounts, and a unique consecutive number. This endpoint is typically used to register new budget estimates or quotations for clients, supporting accurate and transparent sales processes.