feat(raster-api): add colormaps for new sport layers

[kyle-lesinger]

What?

Create new colormaps for SPORT near real-time data for:

• soil moisture
• snow depth
• green vegetation fraction

Why?

Current matplotlib palettes do not account for these color palettes (and VEDA does not have this palette either). This is for continuous data.

How to apply (application considerations)

Need to identify best method for adding these continuous color palettes to data that has colors which represent different value ranges. Only new color palette that this applies to is snow depth sport_snow_depth.npy

• SPORT Alaska snow depth color palette and numbers from source

To re-summarize:

• the first color (white) represents a values 1 or less
• But second to last color (orange) represents values between 420-480.
• Another example is dark green represents values between 36-48.