Annotate into { } overloads for limited constant String return value support

Author: koperagen

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/group.kt

@@ -171,9 +171,11 @@ public class GroupClause<T, C>(internal val df: DataFrame<T>, internal val colum
  * where that column should be grouped.
  * All selected columns will be moved under the groups defined by this expression.
  */
+@Refine
 @JvmName("intoString")
 @OverloadResolutionByLambdaReturnType
 @OptIn(ExperimentalTypeInference::class)
+@Interpretable("IntoStringLambda")
 public fun <T, C> GroupClause<T, C>.into(column: ColumnsSelectionDsl<T>.(ColumnWithPath<C>) -> String): DataFrame<T> =
     df.move(columns).under { column(it).toColumnAccessor() }
 

core/src/main/kotlin/org/jetbrains/kotlinx/dataframe/api/rename.kt

@@ -282,6 +282,8 @@ public fun <T, C> RenameClause<T, C>.into(vararg newNames: KProperty<*>): DataFr
  * and returns the new column name.
  * @return A new [DataFrame] with the columns renamed.
  */
+@Refine
+@Interpretable("RenameIntoLambda")
 public fun <T, C> RenameClause<T, C>.into(transform: (ColumnWithPath<C>) -> String): DataFrame<T> =
     renameImpl(transform)