Faster cc_sea(): switched terra:extract to terra:relate

[plantarum]

In my tests this decreased the processing time for 10K records from 94 seconds to < 1 second. I didn't look too carefully at the logic in that function, after determining that it was the call to terra:extract that was taking up all the time, and terra:relate could be made to accomplish the same thing in a tiny fraction of the time.

I ran your tests and everything came back fine (except for an unrelated issue with cc_outl and Taiwan?).

data(buffland)
buffland <- unwrap(buffland)
crs(buffland) <- '+proj=longlat +datum=WGS84 +no_defs'

x <- data.frame(decimalLongitude = runif(10000, -180, 180), 
                decimalLatitude = runif(10000, -90, 90))

cleaned <- cc_sea(x, ref = buffland)

[azizka]

Looks good. Thanks!