Custom gust ranges to increase reliability of alerts

[faithfullytuned]

Currently the alerts only represent the prevailing wind speed.
Without the ability to set custom gust ranges there are more frequent and less reliable notifications thus decreasing there usefulness.
Implementation would not need to be different from the current bar, one for consistent wind and one for gusts .

[idefix37]

@faithfullytuned

See a related thread

https://community.windy.com/topic/29292/setting-a-wind-gust-alert?_=1717828322369