Writes a raw image (PNG-encoded bytes) to the system clipboard so it can be pasted into other applications as an image rather than as a file.
Reads plain text from the system clipboard via the main-process
electron.clipboard. Used instead of navigator.clipboard.readText()
so the renderer's deny-by-default permission policy does not have to
grant the sensitive clipboard-read permission to the whole session.
Renderer access to the system clipboard for cases the standard Web API can't cover.