Add slippage protection to "swap" and "transfer" #644
Description
Currently, the options for protecting against sandwich attacks/front-running that are in place for btcli st add:
--tolerance,--rate-tolerance
--safe-staking,--safe
--no-safe-staking,--unsafe
are not available for swap or transfer. Both swap and transfer allow for moving of stakes across subnets, which results in an unstake-and-stake operation in the back-end, which means that there is an opportunity for the operation to be attacked.
Although it may be that the default 5% tolerance automatically applies, users should be able to increase the tolerance (or even decrease it, if they want to be more risky).
I recommend that you add these three options to swap and transfer so that those commands are consistent with add.