Support DEX orders on stellar client

[AlaaElattar]

Description

• support placing, canceling, and listing orders

Changes

• Added createOrder, user can create buy/sell orders for specific assets.
• Added cancelOrder, user can cancel specific order with its id.
• Added getOrderBook, user can get oder book of the conversion between any 2 assets.
• Added listMyOffers, user can list its offers.
• Added updateOrder, user can update an existing offer with its id.

Related Issues

#112

Checklist

• Tests included
• Build pass
• Code format
• Screenshots/Video attached (needed for UI changes)

[zaelgohary]

Please fix analyze workflow. Also, can you replace prints with logger?

[zaelgohary]

I get insufficient balance although I have enough XLMs in my balance.

Also, USDC asset code is not added while adding trustline,

Logger is not working. I had to edit the logger value in client to the following for it to print.

  var logger = Logger(
    printer: PrettyPrinter(
      methodCount: 2,
      errorMethodCount: 8,
      lineLength: 120,
      colors: true,
      printEmojis: true,
    ),
    level: Level.debug,
    filter: ProductionFilter(),
  );

[zaelgohary]

Although I create an order successfully, I get an empty list when listing offers.

[zaelgohary]

I get the following error while updating the order.

[AlaaElattar]

Although I create an order successfully, I get an empty list when listing offers.

• I tried the same behavior and the balance changed.
  

[AlaaElattar]

I get the following error while updating the order.

• The offers list is empty which means the order already done.
• That's why its not found when updating it in the offers.