@gridkitjs/core v0.2.0

7f0645b: Column ordering, as the framework-agnostic half of drag-and-drop reordering. applyColumnOrder(columns, order) permutes a column list by a ColumnOrderState — an array of column ids that need not name every column, so one it omits keeps its position among the definitions and follows those it lists. moveColumnBefore(order, movedId, beforeId) produces the new order, returning the array it was given when the move changes nothing, and resolveDropBefore(order, targetId, side) turns a "before"/"after" hit into the id to move in front of, and movesColumn(order, movedId, beforeId) answers whether such a move would rearrange anything — the two gaps either side of a column are drops that change nothing, so an adapter asks this before offering one as a target.

Columns also take a reorderable flag, resolved by resolveColumnWidths from the new reorderable option in the same way as resizable and surfaced on ResolvedColumn.