Title: Refactor swapBridgeAmount to settledAmount for Enhanced Security in Withdrawal Calculations

[SibghatUllah1997]

Description:

Summary

This PR introduces a key update in our contract's handling of fund transfers. We have renamed swapBridgeAmount to settledAmount, and altered its functionality to enhance security and accuracy in the withdrawal process.

Changes

• Renamed swapBridgeAmount to settledAmount.
• Modified the calculation of settledAmount to represent the actual amount the Fund Manager (FM) will receive.
• The settledAmount now denotes the amountIn on the target side,

Rationale

Previously, swapBridgeAmount was calculated before initiating a swap, representing an estimated amountIn to be received on the target side. However, this pre-swap estimation posed potential risks, as the actual received amount could differ during the swap. To address this, we've shifted to calculating settledAmount internally within the contract after the swap is completed. This approach ensures that settledAmount accurately reflects the amount received by the FM, thereby improving the security and accuracy of the subsequent withdrawal calculations.

Impact

• Security: This change mitigates the risk of discrepancies between the estimated and actual received amounts during swaps.
• Accuracy: Withdrawal amounts will now be calculated based on the accurate settledAmount, leading to more precise and reliable transactions.