Refactor README for clarity and conciseness

Removed redundant description and clarified the purpose of code samples.

Signed-off-by: CØDE N!NJΔ <najaf.shaikh@gmail.com>

Author: NinjaRocks

README.md

@@ -13,9 +13,7 @@
 ---
 ## Overview
 
-Runnable code samples for **Generative AI in .NET** by Najaf A. Shaikh.
-
-Every sample in this repo corresponds to a section of the printed book. The full book-to-code map lives in [`docs/citation-index.md`](docs/citation-index.md). When the book condenses a section in favor of pointing here, the manuscript cites a **tag** (e.g. `v1.0-first-print`) so the cited code matches the print run -- `master` will drift as the surrounding APIs evolve.
+**Runnable code samples** - Every sample code in this repo corresponds to a section of the printed book. The full book-to-code map lives in [`docs/citation-index.md`](docs/citation-index.md). When the book condenses a section in favor of pointing here, the manuscript cites a **tag** (e.g. `v1.0-first-print`) so the cited code matches the print run -- `master` will drift as the surrounding APIs evolve.
 
 > **About this code.** These are **teaching samples**, not production-grade libraries. They are written for clarity over coverage: each sample demonstrates a single technique, with error handling, retry, observability, and configuration shown to a useful depth rather than exhaustively. Patterns covered -- prompt caching, resilience, evaluation, model routing, output guards, MCP transports -- are real and copy-pasteable, but hardening, threat-modeling, and cost-bounding them for your environment is your responsibility.