Add org-habit colors, fixes nordtheme#61

Author: JonathanReeve

nord-theme.el

@@ -673,6 +673,15 @@
     `(org-footnote ((,class (:foreground ,nord8))))
     `(org-formula ((,class (:foreground ,nord9))))
     `(org-hide ((,class (:foreground ,nord0 :background ,nord0))))
+    `(org-habit-alert-face ((,class (:background ,nord13))))
+    `(org-habit-alert-future-face ((,class (:background ,nord13))))
+    `(org-habit-clear-face ((,class (:background ,nord9))))
+    `(org-habit-clear-future-face ((,class (:background ,nord9))))
+    `(org-habit-overdue-face ((,class (:background ,nord11))))
+    `(org-habit-overdue-future-face ((,class (:background ,nord11))))
+    `(org-habit-ready-face ((,class (:background ,nord14))))
+    `(org-habit-ready-future-face ((,class (:background ,nord14))))
+    `(org-hide ((,class (:foreground ,nord0 :background ,nord0))))
     `(org-link ((,class (:underline t))))
     `(org-scheduled ((,class (:foreground ,nord14))))
     `(org-scheduled-previously ((,class (:foreground ,nord13))))