The great refactor (#82)

source/plugins/traffic/README.md

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+### 🧮 Repositories traffic
+
+    ⚠️ This plugin requires a personal token with repo scope.
+
+The repositories *traffic* plugin displays the number of page views across your repositories.
+
+<table>
+  <td align="center">
+    <img src="https://github.com/lowlighter/lowlighter/blob/master/metrics.plugin.traffic.svg">
+  </td>
+</table>
+
+Because of GitHub REST API limitation, provided token requires full `repo` scope to access traffic informations.
+
+![Token with repo scope](/.github/readme/imgs/setup_token_repo_scope.png)
+
+#### ℹ️ Examples workflows
+
+[➡️ Available options for this plugin](metadata.yml)
+
+```yaml
+- uses: lowlighter/metrics@latest
+  with:
+    # ... other options
+    plugin_traffic: yes
+```