add readme illustrations

Author: micycle1

README.md

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 A robust Java library that computes Euclidean circle packings from triangulations. Ported from Gerald Orick’s [GOPack](https://github.com/kensmath/GOPack) for accuracy and reliability.
 
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+<table align="center"> <tr> <td><img src="resources/poisson_pack.png" alt="Poisson 1" style="width:33.333%;height:auto;display:block;"/></td> <td><img src="resources/hex_pack.png" alt="Hex 2" style="width:33.333%;height:auto;display:block;"/></td> <td><img src="resources/nrooks_pack.png" alt="NRooks 3" style="width:33.333%;height:auto;display:block;"/></td> </tr> </table>
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+<p align="center"> <img src="resources/poisson_pack.png" alt="Poisson 1" width="33.333%" style="height:auto;"/> <img src="resources/hex_pack.png" alt="Hex 2" width="33.333%" style="height:auto;"/> <img src="resources/nrooks_pack.png" alt="NRooks 3" width="33.333%" style="height:auto;"/> </p>
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+<div style="display:flex; gap:0.5rem; justify-content:center;"> <img src="resources/poisson_pack.png" alt="Poisson 1" style="width:33.333%;" /> <img src="resources/hex_pack.png" alt="Poisson 2" style="width:33.333%;" /> <img src="resources/nrooks_pack.png" alt="Poisson 3" style="width:33.333%;" /> </div>
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 ## Core Idea
 
 Supply a `Triangulation` that defines *which circles are tangent to which*. CircuPack handles all the geometry: it calculates exact radii and center positions so every specified tangency is visually perfect.
 
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 ## Key Features
 
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 *   **Multiple Layouts:** Pack into a disc (MAX_PACK), a custom polygon, or a rectangle.
 *   **Production-Ready:** Built-in numerical safeguards for stable, reliable results.
 
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 ## Quick Start