readme added

README.md

+# Home Assistant integration for WS2812b Strips
+<img src="readme_ims/off.jpg" alt="alt text" title="image Title" height="300"/>
+<img src="readme_ims/red.jpg" alt="alt text" title="image Title" height="300"/>
+
+## Wiring diagram
+<img src="readme_ims/schaltung.svg" alt="alt text" title="image Title"/>
+
+## Build
+Build and flash with platform.io 
+```
+
+```
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