The great refactor (#82)

.github/readme/partials/documentation/plugins.md

@@ -0,0 +1,7 @@
+## 🧩 Plugins
+
+Plugins are features which provide additional content and lets you customize your rendered metrics.
+See their respective documentation for more informations about how to setup them:
+<% for (const [plugin, {name}] of Object.entries(plugins).filter(([key, value]) => value)) { %>
+* [<%= name %>](/source/plugins/<%= plugin %>/README.md)<%# -%>
+<% } %>