An easy way to support panelization

[jmk]

@liang_y_jlu
Here is a quote, from another thread, by a lead developer:

@craftyjon

Panelization is on the complete other end of the scale in terms of complexity. Right now, KiCad does not have the underlying architecture to enable you to open two boards at the same time, for example. There is a long list of challenges to solve before one could write a fully-integrated panelization tool that would feel like the rest of KiCad. Perhaps if more of these challenges are solved later as part of other feature implementations, it will become less of a big deal to add a panelization tool. But for right now, it’s far more complex a thing to ask for than almost any other feature that anyone asks for (up there with integrated FEM, which is something a lot more people have been asking for).

Maybe panelizing is not so easy to support.