Create order response

[OGester]

Create new response for

• [ ] creating order ("/orders")
• [ ] retrieving all orders ("/orders/all/{username}")
• [ ] seller history ("/buyerhistory/{buyerId}")
• [ ] buyer history ("/sellerhistory/{buyerId})

OrderResponse should contain

• [ ] Buyer username
• [ ] Seller username
• [ ] List of game title and price
• [ ] Order total

[OGester]

I started this in my branch for buyer/seller history, had sucess in returning buyer and order total but got stuck trying to retract game title, price per game and seller. Reverted to returning all info as before since that is a working method creating a game to show customer. So we need to discuss if prio is to invest more time in this issue right now or to accept the return we get for the moment? if Yes we want to invest time in this issue before prioritising other issues, we need to team up and brainstorm :)