Added per-core "blinkenlights" to my server to show CPU activity

All you need is a pi pico (or any micro controller), a dozen resistors and a dozen leds. In my case 12 worked out well, because my machine has 6 cores, 12 threads. Each thread gets its own LED to blink. I think it looks fantastic, and I'm quite happy with the result. Going to try and actually mount it into a custom front panel down the line.