WakaTime plugin (#90)

source/plugins/wakatime/README.md

@@ -0,0 +1,36 @@
+### ⏰ WakaTime plugin
+
+The *wakatime* plugin displays statistics from your [WakaTime](https://wakatime.com) account.
+
+<table>
+  <td align="center">
+    <img src="https://github.com/lowlighter/lowlighter/blob/master/metrics.plugin.wakatime.svg">
+    <img width="900" height="1" alt="">
+  </td>
+</table>
+
+<details>
+<summary>💬 Obtaining a WakaTime token</summary>
+
+Create a [WakaTime account](https://wakatime.com) and retrieve your API key in your [Account settings](https://wakatime.com/settings/account).
+
+![WakaTime API token](/.github/readme/imgs/plugin_wakatime_token.png)
+
+Then setup [WakaTime plugins](https://wakatime.com/plugins) to be ready to go!
+
+</details>
+
+#### ℹ️ Examples workflows
+
+[➡️ Available options for this plugin](metadata.yml)
+
+```yaml
+- uses: lowlighter/metrics@latest
+  with:
+    # ... other options
+    plugin_wakatime: yes                                      # (🚧 @master feature)
+    plugin_wakatime_token: ${{ secrets.WAKATIME_TOKEN }}      # Required
+    plugin_wakatime_days: 7                                   # Display last week stats
+    plugin_wakatime_sections: time, projects, projects-graphs # Display time and projects sections, along with projects graphs
+    plugin_wakatime_limit: 4                                  # Show 4 entries per graph
+```