Add Flexoki Light as new default theme

themes/flexoki-light/walker.css

@@ -0,0 +1,6 @@
+@define-color selected-text #205EA6;
+@define-color text #100F0F;
+@define-color base #FFFCF0;
+@define-color border #205EA6;
+@define-color foreground #100F0F;
+@define-color background #FFFCF0;