feat(themes): add nightfox themes (#2384)

example/themes/nightfox.kdl

@@ -0,0 +1,44 @@
+// Nightfox Theme:
+// https://github.com/edeneast/nightfox.nvim
+
+themes {
+  dayfox {
+    bg "#f6f2ee"
+    fg "#3d2b5a"
+    red "#a5222f"
+    green "#396847"
+    blue "#2848a9"
+    yellow "#ac5402"
+    magenta "#6e33ce"
+    orange "#955f61"
+    cyan "#287980"
+    black "#d3c7bb"
+    white "#643f61"
+  }
+  nightfox {
+    bg "#192330"
+    fg "#cdcecf"
+    red "#c94f6d"
+    green "#81b29a"
+    blue "#719cd6"
+    yellow "#dbc074"
+    magenta "#9d79d6"
+    orange "#f4a261"
+    cyan "#63cdcf"
+    black "#29394f"
+    white "#aeafb0"
+  }
+  terafox {
+    bg "#152528"
+    fg "#e6eaea"
+    red "#e85c51"
+    green "#7aa4a1"
+    blue "#5a93aa"
+    yellow "#fda47f"
+    magenta "#ad5c7c"
+    orange "#ff8349"
+    cyan "#a1cdd8"
+    black "#254147"
+    white "#cbd9d8"
+  }
+}