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
7267682017