Implement naive Snow Storm palette

Implement naive Snow Storm palette

This basically reverts first seven palette colors'
order, which is what "bright to dark" style recommends.
Bright color used for comments is blended by hand and
should be critiqued.

Dark to bright approach is also possible, by swapping
nord0_gui and nord2_gui in light palette.
However, the outcome looks incomplete and definitely needs
additional work to be viable.

Note: the colors might be hard to read on thin fonts
      I.e. Cascadia Mono Pl Light takes some adjusting
      while Cascadia Mono Pl looks good outright