feat: poder cambiar al tema oscuro en firefox

app/assets/stylesheets/dark.scss

@@ -0,0 +1,9 @@
+$black: black;
+$white: white;
+$cyan: #13fefe;
+
+:root {
+  --foreground: #{$white};
+  --background: #{$black};
+  --color: #{$cyan};
+}

app/views/layouts/application.html.haml

@@ -14,6 +14,7 @@
     %script{ type: 'text/javascript', src: '/env.js' }
     = csrf_meta_tags
     = stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload'
+    = stylesheet_link_tag 'dark', rel: 'alternate stylesheet', media: 'all', 'data-turbolinks-track': 'reload', title: t('dark')
     = javascript_pack_tag 'application', 'data-turbolinks-track': 'reload'
     = stylesheet_pack_tag 'application', 'data-turbolinks-track': 'reload'
     = favicon_link_tag 'sutty_cuadrada.png', rel: 'apple-touch-icon', type: 'image/png'

config/locales/en.yml

@@ -1,4 +1,5 @@
 en:
+  dark: Dark
   dir: ltr
   en: English
   es: Castellano 

config/locales/es.yml

@@ -1,4 +1,5 @@
 es:
+  dark: Oscuro
   es: Castellano
   en: English
   es-AR: Castellano Rioplatense