Update README.md

Create README.md

set up order confirmation test

added test condition for loading

set up react components'

set up tests for orderPhase

fix of the act error for unmounted component

set up tests for grand total

updated topping option component

added toppings subtotal test

set up global wrapper with context for tests

set up UI part for the forms

set up OrderDetails React Context logic

added unit tests for scoops subtotal

added waitFor handle for async methods