samhocevar/zepto8 ? reverse-engineered prompt

Build me a working first pass of this fantasy console project, centered on the PICO 8 emulator and the small utility toolkit it comes with.

I want it to be able to run carts, follow the documented PICO 8 language as closely as possible, and have the basic pieces wired together so I can launch it, load a cart, and see something happen. If the docs mention extra tools or helper commands, include those too. The experimental IDE can stay rough, but please make sure the core emulator and toolkit are usable and not just stubs.

Use the README and the docs in the repo as the source of truth, and if anything is unclear, check the current docs online before filling in the gaps. Keep it practical, make it build cleanly, and add or fix whatever tests are needed so I can tell the main features are actually working.