feat(RankIcon): add rank_icon option (#2628)

* feat(theme): add github_dark_dimmed theme

* feat(theme): change github_dark_dimmed icon color

* contrast ratio adjustment

contrast ratio adjustment on github_dark_dimmed theme

* feat(theme): readme preview

* feat(theme): github themes next to each other

* github themes next to each other

* feat(RankIcon): add rank icon option

* feat(RankIcon): extract rankIcon to icons file

* feat(RankIcon): update readme

* feat(RankIcon): test coverage

* Update readme.md

Co-authored-by: Rick Staa <rick.staa@outlook.com>

---------

Co-authored-by: Rick Staa <rick.staa@outlook.com>

api/index.js

@@ -37,6 +37,7 @@ export default async (req, res) => {
     border_radius,
     number_format,
     border_color,
+    rank_icon,
   } = req.query;
   res.setHeader("Content-Type", "image/svg+xml");
 
@@ -92,6 +93,7 @@ export default async (req, res) => {
         number_format,
         locale: locale ? locale.toLowerCase() : null,
         disable_animations: parseBoolean(disable_animations),
+        rank_icon,
       }),
     );
   } catch (err) {