Create train-the-trainer.md

Author: BoyceLab

docs/train-the-trainer.md

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+# OHDSI Train the Trainer (Epilepsy)
+
+Below is the embedded **Train the Trainer** program:
+
+<iframe 
+  src="https://boycelab.github.io/OHDSITrainTheTrainer-EPILEPSY/" 
+  width="100%" 
+  height="800px" 
+  style="border:1px solid #ccc;">
+</iframe>
+
+---
+
+If the embedded version doesn’t display, you can open it directly:  
+[Open OHDSI Train the Trainer →](https://boycelab.github.io/OHDSITrainTheTrainer-EPILEPSY/)