Add warnings if price impact is too high when zapping in

[gordonel]

The front-end doesn't warn if zapping in would cause a swap at an unfavorable rate. On a regular DEX, the user would get a warning if price impact on swapping certain amounts is too high. Adding such warnings to Beefy would improve the overall UX for the zap in feature

Source: Telegram discussion

[elmorterage]

Yeah, that would be very helpful, seconded.