fix: remove the datasets package

Author: clflushopt

glint/src/main/java/co/clflushopt/glint/core/DatasetUtils.java

@@ -1,4 +1,4 @@
-package co.clflushopt.glint.core.datasets;
+package co.clflushopt.glint.core;
 
 import java.util.Arrays;
 

glint/src/main/java/co/clflushopt/glint/examples/NYCYellowTrips.java

@@ -9,8 +9,8 @@
 import org.apache.arrow.vector.types.pojo.ArrowType;
 
 import co.clflushopt.glint.core.CsvReaderOptions;
+import co.clflushopt.glint.core.DatasetUtils;
 import co.clflushopt.glint.core.ExecutionContext;
-import co.clflushopt.glint.core.datasets.DatasetUtils;
 import co.clflushopt.glint.dataframe.DataFrame;
 import co.clflushopt.glint.query.logical.expr.LogicalAggregateExpr;
 import co.clflushopt.glint.query.logical.expr.LogicalCastExpr;