chore: update readme

Author: elringus

README.md

@@ -39,3 +39,10 @@ Facilitating high-level interoperation between C# and TypeScript, Bootsharp lets
 ## 🎬 Get Started
 
 https://bootsharp.com/guide
+
+---
+
+<a href="https://naninovel.com">
+  <p align="center">Bootsharp is used in <strong>Naninovel: Visual Novel, Dialogue & Cutscene Storytelling Engine</strong>. Check it out!</p>
+  <p align="center"><img alt="naninovel banner" src="https://raw.githubusercontent.com/elringus/cdn/main/naninovel-banner-wide.png"></p>
+</a>