WE'RE SIMULATING #CIRCUITPYTHON IN CI! LET'S GOOOOOO

The simulation step is already a reusable workflow, so now it's just about figuring out how to generalize what I've got here into one as well for the rest of the codebase for other CI!

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https://github.com/tekktrik/CircuitPython_Nitroclass/actions/runs/22814207426/job/66176510327