Raspberry Pi Pico Button Controlled LED (Push, GP14 + GP2)

First **input** project with Pico — button read! 🔘 LED lights while button is pressed, off when released. This is the big step after LED animations: **signal input from the world to Pico**. Learn `Pin.IN` (input mode), `Pin.PULL_UP` (internal pull-up resistor — standard for buttons), `button.value()` reading. GP14 LED, GP2 button (internal PULL_UP). Pressed = LOW (0), released = HIGH (1) — reverse logic seems confusing at first but is industry standard.