Extend the `GRAPH_OT_paste` operator with an enum to define the value offset. Options are: | Option | Effect | | ------------------- | ----------------------------------------------------------------------------- | | No Offset | use the same key values as the copied keys | | Cursor Value | align the leftmost key with the cursor value | | Current Frame Value | Evaluate the curve under the cursor align the leftmost key with it | | Right Key | Align the rightmost key with the first key that is to the right of the cursor | | Left Key | Align the leftmost key with the first key that is to the left of the cursor | Pull Request #104512