Copy and paste layers or tilesets between projects

Is your feature request related to a problem? Please describe. Copy and paste layers or tilesets between projects, eg ctr+c/v to other tiled app window where in similar level

Describe the solution you'd like ctr+c/v to other tiled app window where in similar level and context menu by RMB to select "copy" coz exist option to export but not import as comfy way.

Describe alternatives you've considered Export or import layers on contex menu including selected all.