Merge branch 'master' into median

Author: Jolanrensen

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

@@ -34,7 +34,7 @@ import kotlin.reflect.KProperty
  *
  * TODO cases where the lambda dictates the return type require explicit type arguments for
  *  non-number, comparable overloads: https://youtrack.jetbrains.com/issue/KT-76683
- *  so, `df.median { intCol }` works, but needs `df.median<_, String> { stringCol }`
+ *  so, `df.median { intCol }` works, but needs `df.median<_, String> { stringCol }` or `df.median({ dateCol })`
  *  This needs to be explained by KDocs
  *
  * medianBy is new for all overloads :)
@@ -541,7 +541,3 @@ public inline fun <T, reified C : Comparable<C & Any>?> PivotGroupBy<T>.medianBy
 ): ReducedPivotGroupBy<T> = medianBy(column.toColumnAccessor(), skipNaN)
 
 // endregion
-
-// region binary compatibility
-// TODO
-// endregion

docs/StardustDocs/topics/add.md

@@ -5,6 +5,9 @@
 Returns [`DataFrame`](DataFrame.md) which contains all columns from original [`DataFrame`](DataFrame.md) followed by newly added columns. 
 Original [`DataFrame`](DataFrame.md) is not modified.
 
+`add` appends columns to the end of the dataframe by default.
+If you want to add a single column to a specific position in the dataframe, use [insert](insert.md).
+
 ## Create a new column and add it to [`DataFrame`](DataFrame.md)
 
 ```text