Feat plugin stock (#196)

source/plugins/stock/README.md

@@ -0,0 +1,34 @@
+### 💹 Stock prices
+
+The *stock* plugin lets you display the stock market price of a given company.
+
+<table>
+  <td align="center">
+    <img src="https://github.com/lowlighter/lowlighter/blob/master/metrics.plugin.stock.svg">
+    <img width="900" height="1" alt="">
+  </td>
+</table>
+
+<details>
+<summary>💬 Obtaining a RapidAPI Yahoo Finance token</summary>
+
+Create a [RapidAPI account](https://rapidapi.com) and subscribe to [Yahoo Finance API](https://rapidapi.com/apidojo/api/yahoo-finance1) to get a token.
+
+![RapidAPI token](/.github/readme/imgs/plugin_stock_token.png)
+
+</details>
+
+#### ℹ️ Examples workflows
+
+[➡️ Available options for this plugin](metadata.yml)
+
+```yaml
+- uses: lowlighter/metrics@latest
+  with:
+    # ... other options
+    plugin_stock: yes
+    plugin_stock_token: ${{ secrets.STOCK_TOKEN }} # RapidAPI Yahoo Finance token
+    plugin_stock_symbol: TSLA                      # Display Tesla stock price
+    plugin_stock_duration: 1d                      # Display last day of market
+    plugin_stock_interval: 5m                      # Use precision of 5 minutes for each record
+```