initial batreus files

boards/jpconstantineau/Batreus44/README.md

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+# JPConstantineau's Batreus44: An Atreus44 clone with Low Profile Switches and Wireless Options!
+
+![Batreus44](https://preview.redd.it/yu090ikxiou71.jpg?width=4032&format=pjpg&auto=webp&s=6da758f1ca439ecee912b35a709eacef9b019cd8)
+
+44 Keys Low Profile Keyboard inspired from Keyboardio's Atreus with a socket for a NiceNano, BlueMicro840 or Pro Micro RP2040 and a place to solder in a Battery.
+
+kb.py is designed to work with the BlueMicro840
+
+Retailers (USA)  
+
+
+Extensions enabled by default  
+- [Layers](https://github.com/KMKfw/kmk_firmware/tree/master/docs/layers.md) Need more keys than switches? Use layers.
+- [MediaKeys](https://github.com/KMKfw/kmk_firmware/tree/master/docs/media_keys.md) Control volume and other media functions