Your option now, really, is solar power path lights, mounted lowed faced up.

otherwise, you do have to bury behind drill through and plunk the wire out of the wall to the front. anything else is going to look exactly like an afterthought.

When we built our pool in 2008, we had them stub out an electrical port so that we would have electricity available when we later put in the landscape lighting. Life got busy and we never got that done before the great options and selections of the LED solar lights available.

For the wall, I would look into a high quality path light that has a strong adhesive for outdoors if you didn’t want to drill into your stone. That said, most will likely be the screw in type and you could switch out the wood screws for masonry screws. Here’s one I found at Lamps Plus that would not take away from your stone.

https://www.lampsplus.com/products/mystic-3-inch-high-electroplated-copper-solar-led-deck-light__15a72.html