feat(credits): add in both nds and repo

CREDITS.md

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+# Credits
+
+## 3D Model
+
+**"Nintendo DS Lite"** by Cianon
+https://skfb.ly/6ZDvQ
+Licensed under [Creative Commons Attribution 4.0](http://creativecommons.org/licenses/by/4.0/)
+Modified from the original.
+
+## 2D Nintendo DS CSS
+
+Based on **"CSS Nintendo DS"** by Alexandra Radevich (@aradevich)
+https://codepen.io/aradevich/pen/mdRYzyJ
+
+## UI Design & Sound Effects
+
+**Nintendo DS** — UI design and sound effects are property of Nintendo.
+https://nintendo.com
+© Nintendo