feat(plugins/starlists): add new starlists plugin (#765)

source/plugins/starlists/README.md

@@ -0,0 +1,25 @@
+### 💫 Starlists
+
+The *starlists* plugin displays your recently star lists.
+
+<table>
+  <td align="center">
+    <img src="https://github.com/lowlighter/lowlighter/blob/master/metrics.plugin.starlist.svg">
+    <img width="900" height="1" alt="">
+  </td>
+</table>
+
+#### ℹ️ Examples workflows
+
+[➡️ Available options for this plugin](metadata.yml)
+
+```yaml
+- uses: lowlighter/metrics@latest
+  with:
+    # ... other options
+    plugin_starlists: yes
+    plugin_starlists_limit: 16             # Limit to 16 entries
+    plugin_starlists_limit_repositories: 2 # Limit to 2 repositories per entries
+    plugin_starlists_ignored: list1, list2 # Ignored lists
+    plugin_starlists_only: list3           # Only display this list
+```