style(theme): added new theme "kacho-ga" (#589)

* Update index.js

Added a new theme

* Update index.js

* Update index.js

fixed the broken name

themes/index.js

@@ -250,6 +250,12 @@ const themes = {
     icon_color: "89ddff",
     text_color: "27e8a7",
     bg_color: "242938"
+  },
+  kacho_ga: {
+    title_color: "bf4a3f",
+    icon_color: "a64833",
+    text_color: "d9c8a9",
+    bg_color: "402b23"
   }
 };