Fix trade proposal price validation & Minor fixes

[altafan]

This fixes the validation of a trade proposal's price, which hasn't been updated after moving to tdex-protobuf@v2.

This also fixes the expiration of the trades by correctly dereferencing elements of a slice within a loop.

Last but not least, this increases the waiting time before configuring the CLI in the e2e tests, which seems to be slower on CI rather than it is locally.

[what-the-diff[bot]]

PR Summary

• Change in loop style for checkForPendingTrades() The for loop in this function has been updated to a more modern range loop for cleaner code and better readability.
• Removed feesToAdd parameter in TradePropose() The feesToAdd parameter has been removed from the isValidTradePrice() function call, simplifying the function's usage.
• Updates to the utils:
  • Added feeAsset, otherAmount, and otherAsset variables for enhanced functionality.
  • Renamed the amount variable to expectedAmount for clearer context.
  • Replaced the GetFee* methods in preview with swapRequest's methods while retaining the asset-related functionality.