API Endpoint - Retrieve a list of available times for a product

[deltabrot]

Desired functionality:
Based on the availability, booking, and qualification of account row links, a list of available times for a given date should be calculated and returned on the endpoint.

A date should be passed to the endpoint as URL query param.

Store methods needed:
Store: ProductStore
Methods: GetAllAvailableTimes(date time.Time) ([]time.Time, error)

Endpoints needed:
Route: /product/{id}/available/time
Method: GET