Added

New v3 API recipes

We have added two new recipes for showcasing more workflows with the v3 API.

RecipeDescription
Connect with a BILL network vendorIn this recipe, we search for and invite a network vendor.
Expense management with users, budgets, and virtual cardsIn this recipe, we create a Spend & Expense user for a budget and then assign the user to a budget. In addition, we create a virtual card and assigned it to the budget user.