feat: add skins/minima

- _sass
   - minima
      - classic
      - dark
      - solarized-dark
      ‐ solarized-light

Author: RalphHightower

_sass/minima/skins/classic.scss

@@ -0,0 +1,5 @@
+@charset "utf-8";
+
+$color-scheme-auto: false;
+$color-scheme-dark: false;
+@import "minima/skins/auto";

_sass/minima/skins/dark.scss

@@ -0,0 +1,5 @@
+@charset "utf-8";
+
+$color-scheme-auto: false;
+$color-scheme-dark: true;
+@import "minima/skins/auto";

_sass/minima/skins/solarized-dark.scss

@@ -0,0 +1,5 @@
+@charset "utf-8";
+
+$sol-is-auto: false;
+$sol-is-dark: true;
+@import "minima/skins/solarized";

_sass/minima/skins/solarized-light.scss

@@ -0,0 +1,4 @@
+@charset "utf-8";
+
+$sol-is-auto: false;
+@import "minima/skins/solarized";