Add special thanks to Ramkumar KB and Ona in preface

Co-authored-by: Ona <no-reply@ona.com>

Author: Siddhant-K-code

src/content/chapters/preface.mdx

@@ -28,4 +28,8 @@ I wrote this for the engineer who needs to make decisions about agent adoption t
 
 If this book saves you from one bad architectural decision, one security incident, or one wasted month chasing the wrong abstraction, it will have been worth writing.
 
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+**Special thanks** to [Ramkumar KB](https://www.linkedin.com/in/ramkumarkb/) for being an early supporter. His sponsorship funded a year-long [Typst](https://typst.app/) subscription, where this book was originally written and typeset as a PDF. When I decided to launch it as a website instead, [Ona](https://ona.com) made that possible - handling the entire site build and the Typst-to-web content migration.
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 *- Siddhant Khare* *(February 2026)*