Returns a list of growth plans available for the user to choose.

As new versions of plans are introduced, users who were on old plans can still choose from old plans.

@spec suggest(Plausible.Auth.User.t(), non_neg_integer()) ::
  Plausible.Billing.Plan.t()

Returns the most appropriate plan for a user based on their usage during a given cycle.

If the usage during the cycle exceeds the enterprise-level threshold, or if the user already belongs to an enterprise plan, it suggests the :enterprise plan.

Otherwise, it recommends the plan where the cycle usage falls just under the plan's limit from the available options for the user.

This function takes a list of plans as an argument, gathers all product IDs in a single list, and makes an API call to Paddle. After a successful response, fills in the monthly_cost and yearly_cost fields for each given plan and returns the new list of plans with completed information.

@spec yearly_product_ids() :: [String.t()]

List yearly plans product IDs.