arphit: RBA-style R Plots

#nolint start
DEFAULTCOLOURS <- c(RBA["Aqua8"],
                    RBA["Orange2"],
                    RBA["DarkGreen7"],
                    RBA["Violet1"],
                    RBA["Blue7"],
                    RBA["Red5"],
                    RBA["Brown4"],
                    RBA["Pink2"],
                    RBA["Grey7"])
CSI <- 0.2
LANDSCAPESIZE <- c(0.736842 * 7.5, 7.5)
PORTRAITSIZE <- c(10, 7.5)
PERMITTEDLABELS <- c(1, 1.5, 2, 2.5, 3, 5)
PERMITTEDSTEPS <- c(4, 5, 6, 7)
DEFAULTSCALEUNITS <- "%"
NSPACESNOTES <- 8
WIDTHSPACESNOTES <- 0.4895833
NSPACESSOURCES <- 17
WIDTHSPACESSOURCES <- 0.9583333
DEFAULTPCH <- NA
DEFAULTLTY <- 1
DEFAULTLWD <- 2
EMPTYSCALE <- list("min" = -1, "max" = 2, "nsteps" = 4)
EMPTYXSCALE <- c(2000, 2010)
DEFAULTTICKLENGTH <- 0.02
DEFAULTBARCOL <- NA
DEFAULTARROWLWD <- 1
PNGDPI <- 300
MINIMUMSIDEPADDING <- 0.2
MAXXLABELS <- 8
MAXLEGENDCHARS <- 45
LASTYEARPADDING <- 0.03

# AUTOLABELLER
AUTOLABEL_PADDING <- 0.05 # In inches
AUTOLABEL_FALLBACK_PADDING <- 0.02
AUTOLABEL_XSTEPS <- 20
AUTOLABEL_YSTEPS <- 15
AUTOLABEL_FALLBACK_STEPS <- 50
#nolint end