FormidableLabs/spectacle ? reverse-engineered prompt

Build me a React based presentation app where I can create slide decks with JSX and show live code examples inside the slides. I want it to feel polished and easy to use, with a simple way to add text, images, code, and speaker friendly layouts, plus navigation between slides that works well in a presentation setting.

It should be set up as a small monorepo style project with the main library, some docs, and a few examples so I can see how to use it right away. Please make the default experience good enough that someone can open it, start editing a deck, and preview the results without a lot of setup. If anything needs current library guidance or best practices, look up the latest docs online and follow those.