Brand assets for Project Satori and DER Security.

satori.png            Satori lockup, dark text -- for light backgrounds
satori-dark.png       Satori lockup for dark backgrounds -- the official
                      dark export, with its uniform background lifted to
                      transparency so the mark floats on any dark theme
satori-mark.png       square Satori mark, charcoal on transparency --
                      the docs-site favicon
satori-mark-dark.png  the same mark in the brand cream, for dark
                      surfaces -- the docs-site header logo
dersec-dark.png       DER Security lockup, dark text
dersec-white.png      DER Security lockup, white text

The README pairs the light/dark variants with <picture>
prefers-color-scheme sources, so the banner is legible in both GitHub
themes.

Referenced by relative path rather than by raw.githubusercontent URL,
because this repository is private and those URLs do not resolve without
a token. Switch to absolute URLs if the README is ever published
somewhere that does not resolve relative paths, such as a PyPI page.
