Add Spendable Outputs Kotlin example

[netlify[bot]]

✅ Deploy Preview for lightningdevkit ready!

Name	Link
🔨 Latest commit	dd3a4ae2f9090d8b9bbee1f07ccb04b9b7acba19
🔍 Latest deploy log	https://app.netlify.com/sites/lightningdevkit/deploys/65b810d4d7b1330008f17067
😎 Deploy Preview	https://deploy-preview-245--lightningdevkit.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 configuration.