Refactor plotting functions to use `cptcity::cpt("jjg_misc_seminf_haxby")`

[bryce-carson]

All plotting functions that used the Semi-infinite Haxby colour pallete will now use a function in the cptcity package to acquire the palette on demand.

[bryce-carson]

Throughout the plotting functions the Haxby colour pallet is hard-coded and duplicated, again, and again, and again.

Just use cptcity::cpt("jjg_misc_seminf_haxby", n = 30), where n is the desired number of breaks or bins.

[ashokkrish]

Throughout the plotting functions the Haxby colour pallet is hard-coded and duplicated, again, and again, and again.

Just use cptcity::cpt("jjg_misc_seminf_haxby", n = 30), where n is the desired number of breaks or bins.

This is great!

[bryce-carson]

options("terra.pal" = map.pal("haxby", length(cuts)))

[bryce-carson]

cuts <- (NA, 0, ...)