The great refactor (#82)

source/plugins/topics/README.md

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+### 📌 Starred topics
+
+The *topics* plugin displays your [starred topics](https://github.com/stars?filter=topics).
+Check out [GitHub topics](https://github.com/topics) to search interesting topics.
+
+<table>
+  <td align="center">
+    <img src="https://github.com/lowlighter/lowlighter/blob/master/metrics.plugin.topics.svg">
+    <details open><summary>Mastered and known technologies version</summary>
+      <img src="https://github.com/lowlighter/lowlighter/blob/master/metrics.plugin.topics.mastered.svg">
+    </details>
+    <img width="900" height="1" alt="">
+  </td>
+</table>
+
+This uses puppeteer to navigate through your starred topics page.
+
+#### ℹ️ Examples workflows
+
+[➡️ Available options for this plugin](metadata.yml)
+
+```yaml
+- uses: lowlighter/metrics@latest
+  with:
+    # ... other options
+    plugin_topics: yes
+    plugin_topics_sort: stars    # Sort by most starred topics
+    plugin_topics_mode: mastered # Display icons instead of labels
+    plugin_topics_limit: 0       # Disable limitations
+```