Yeah, I did with Python which I never used to do GUI so that was hard for meYou probably can with any language the disadvantage is that this editor is strictly Windows-only because it's a .NET 5 desktop app. I thought it was possible to run on Mac for example using Mono but it was confirmed to me that it does not run.
On the other hand, datamining allows you to have readily information taken directly from the game such as item IDs, sprites, names, instead of adding them by hand.
I wish I had the time to document it more
When I have the time, I can try to decompile P5S and send you the assets. (I own the game)
Then they have multiple saves which I did each of them. I didn't datamining, but I got the Offsets/IDs from SaveWizard Discord & I did rest of the saves.