Add plugin annotations for corr, cumSum, asFrame

Author: koperagen

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

@@ -453,6 +453,8 @@ public inline fun <T, C, reified R> Convert<T, C>.with(
  *
  * @param [expression] The {@include [ExpressionsGivenDataFrame.DataFrameExpressionLink]} to replace the selected column group with.
  */
+@Refine
+@Interpretable("ConvertAsFrame")
 public fun <T, C, R> Convert<T, DataRow<C>>.asFrame(
     expression: ColumnsContainer<T>.(ColumnGroup<C>) -> DataFrame<R>,
 ): DataFrame<T> = asColumn { expression(this, it.asColumnGroup()).asColumnGroup(it.name()) }

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

@@ -4,6 +4,8 @@ import org.jetbrains.kotlinx.dataframe.AnyCol
 import org.jetbrains.kotlinx.dataframe.ColumnsSelector
 import org.jetbrains.kotlinx.dataframe.DataFrame
 import org.jetbrains.kotlinx.dataframe.annotations.AccessApiOverload
+import org.jetbrains.kotlinx.dataframe.annotations.Interpretable
+import org.jetbrains.kotlinx.dataframe.annotations.Refine
 import org.jetbrains.kotlinx.dataframe.api.CorrDocs.Grammar
 import org.jetbrains.kotlinx.dataframe.api.CorrDocs.SelectingOptions
 import org.jetbrains.kotlinx.dataframe.columns.ColumnGroup
@@ -127,6 +129,8 @@ public data class Corr<T, C>(internal val df: DataFrame<T>, internal val columns
  *
  * @return A square correlation matrix as a [DataFrame], where both rows and columns correspond to the original columns.
  */
+@Refine
+@Interpretable("DataFrameCorr")
 public fun <T> DataFrame<T>.corr(): DataFrame<T> =
     corr {
         colsAtAnyDepth().filter { it.isSuitableForCorr() }

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

@@ -4,6 +4,8 @@ import org.jetbrains.kotlinx.dataframe.ColumnsSelector
 import org.jetbrains.kotlinx.dataframe.DataColumn
 import org.jetbrains.kotlinx.dataframe.DataFrame
 import org.jetbrains.kotlinx.dataframe.annotations.AccessApiOverload
+import org.jetbrains.kotlinx.dataframe.annotations.Interpretable
+import org.jetbrains.kotlinx.dataframe.annotations.Refine
 import org.jetbrains.kotlinx.dataframe.api.Select.SelectSelectingOptions
 import org.jetbrains.kotlinx.dataframe.columns.ColumnReference
 import org.jetbrains.kotlinx.dataframe.columns.toColumnSet
@@ -114,6 +116,8 @@ public fun <T : Number?> DataColumn<T>.cumSum(skipNA: Boolean = defaultCumSumSki
  * {@include [CumSumDocs]}
  * {@set [CumSumDocs.DATA_TYPE] [DataFrame]}
  */
+@Refine
+@Interpretable("DataFrameCumSum")
 public fun <T, C : Number?> DataFrame<T>.cumSum(
     skipNA: Boolean = defaultCumSumSkipNA,
     columns: ColumnsSelector<T, C>,
@@ -167,6 +171,8 @@ public fun <T> DataFrame<T>.cumSum(skipNA: Boolean = defaultCumSumSkipNA): DataF
  * {@include [CumSumDocs]}
  * {@set [CumSumDocs.DATA_TYPE] [GroupBy]}
  */
+@Refine
+@Interpretable("GroupByCumSum")
 public fun <T, G, C : Number?> GroupBy<T, G>.cumSum(
     skipNA: Boolean = defaultCumSumSkipNA,
     columns: ColumnsSelector<G, C>,