DEV: Move settings descriptions to locales/en.yml (#33)

This makes translations of the descriptions of the settings with Crowdin possible.
Also updated setting description to Font Awesome 6

Author: moin-Jana

locales/en.yml

@@ -1,6 +1,10 @@
 en:
   theme_metadata:
     settings:
+      add_whitespace:
+        description: "If checked, this will add some whitespace between the default Discourse header icons and the custom icons added via this component"
+      Svg_icons:
+        description: "Include FontAwesome 6 icon classes for each icon used in the list."
       header_links:
         description: Custom links to be displayed in the header
         schema:

settings.yml

@@ -1,14 +1,10 @@
 add_whitespace:
   type: bool
   default: false
-  description:
-    en: "If checked, this will add some whitespace between the default Discourse header icons and the custom icons added via this component"
 Svg_icons:
   type: "list"
   list_type: "compact"
   default: "fab-facebook|fab-twitter"
-  description:
-    en: "Include FontAwesome 5 icon classes for each icon used in the list."
 header_links:
   type: objects
   default: