Replicate isolated margin SDK functions

[Tburm]

Isolated margin read functions

• getMarkets
• getFuturesPositions
• getAverageFundingRates
• getDailyVolumes
• getIsolatedMarginTransfers
• getDelayedOrder
• getDelayedOrders
• getIsFlagged
• getIsolatedTradePreview
• getPositionHistory
• getTradesForMarket
• getAllTrades
• getFuturesTrades
• getOrderFee

Isolated margin write functions

• depositIsolatedMargin
• withdrawIsolatedMargin
• closeIsolatedPosition
• modifyIsolatedMarginPosition
• cancelDelayedOrder
• executeDelayedOffchainOrder