add: script to generate validation data

val.py

@@ -0,0 +1,15 @@
+from pathlib import Path
+
+if __name__ == '__main__':
+    base_path = Path('./data')
+    for rec_p in base_path.glob('*'):
+        train_dir = rec_p / 'train'
+        shard_p = sorted(train_dir.glob('*.parquet'))[0]
+
+        val_dir = rec_p / 'validation'
+        val_dir.mkdir(exist_ok=True)
+
+        # moving shard path to vlidaton set
+        print(
+            f'Moving from "{shard_p.absolute()}" to "{(val_dir / shard_p.name).absolute()}"')
+        shard_p.rename(val_dir / shard_p.name)