Added server POST endpoint and remove deprecated document endpoints

[gramian]

In Section 7.4 HTTP/JSON Protocol:

• Adds server POST endpoint with shutdown command and example
• Removes deprecated create and load document endpoints docu

[netlify[bot]]

✅ Deploy Preview for laughing-saha-bb44e9 ready!

Name	Link
🔨 Latest commit	d1e813d74c26ba5d898123fbdd34603e475d0858
🔍 Latest deploy log	https://app.netlify.com/sites/laughing-saha-bb44e9/deploys/63bc848ace0d72000941a425
😎 Deploy Preview	https://deploy-preview-100--laughing-saha-bb44e9.netlify.app/
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[lvca]

Thanks!