I did something similar ones as a vs code extension for love2d which I called live2d, so that you could develop your game while it was running. It was incredibly fun, but incredibly hard to use, and nobody had any interest in it, so I abandoned it and lost the source code eventually. But it worked so well. I had invented this thing called magic tables to go along with it and make it easier to use, I forgot what they did, I just remember the name and how cool it was.