Feature/colorwork

New themed gradient ramp, which can take any number of color steps and can support any number of theme-scoped file configurations. Renamed existing “ware” and “grey” ramps but left in legacy support (legacy support not fully tested). “Luminance” (now spectral) was ambiguous given all of the gradient scales are luminance based on black, and renamed the grayscale ramp to “neutral” to be just a little bit more abstract so if someone e.g. wants to use green tinted maps they can redefine the neutral ramp to be green. Added Hot and Cool ramps with support for both light and dark themes. Again did not bind these to specific colors leaving them open to customization.  Added support for light backgrounds to the Flat palette. Removed the blue / red palette, which had no particular case in which it performed well. Can possibly be replaced by a polar/signed (can’t remember the name for that offhand) -1 to 0 to 1 cold/hot scale at some point, but then it will have a neutral midpoint. Removed the “inverted” property on color ramps so now there is now only the notion of named themes across everything. Legacy named color ramps should still work when configured but will not have a presence in the control panel (not tested thoroughly, as mentioned).