What you need is available in most large hardware and home improvement stores. The name varies, but your store manager can point you too the correct aisle.
names include
surface-mount channel
surface channels
surface raceway
The channel in plastic or metal is screwed to the wall, wiring added inside and the top cover snaps shut.
place the channel in corners where it will be unobtrusive. Remember to buy corners for changing direction, and surface mount boxes for switches and outlets and the wire and switches.
You can also run the raceway INSIDE cabinets and dinette storage and mount only the plug and switch boxes on the outside surface.