graphics.drawArc() does not match Playdate behaviour

Example `PlaydateSDK/Examples/Single File Examples/arcs.lua` does not work as expected.

<img width="450" height="300" alt="Image" src="https://github.com/user-attachments/assets/a79b1799-5975-4c1c-90e0-25c6928a15d5" />

<img width="460" height="604" alt="Image" src="https://github.com/user-attachments/assets/067e54ca-8241-40ef-a4dd-b8852b63a470" />