Add Stream Deck XL library and test command

cmd/decktest/main.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"image/color"
+	"math/rand/v2"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"qrun/streamdeck"
+)
+
+func main() {
+	dev, err := streamdeck.Open()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+	defer dev.Close()
+
+	fmt.Printf("Connected to: %s (serial: %s)\n", dev.Product(), dev.SerialNumber())
+
+	dev.SetBrightness(80)
+
+	for i := 0; i < streamdeck.KeyCount(); i++ {
+		r := uint8(rand.IntN(256))
+		g := uint8(rand.IntN(256))
+		b := uint8(rand.IntN(256))
+		dev.SetKeyColor(i, color.RGBA{r, g, b, 255})
+	}
+
+	keys := make(chan streamdeck.KeyEvent, 64)
+	go func() {
+		if err := dev.ReadKeys(keys); err != nil {
+			fmt.Fprintf(os.Stderr, "Read error: %v\n", err)
+		}
+	}()
+
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM)
+
+	for {
+		select {
+		case ev := <-keys:
+			if ev.Pressed {
+				fmt.Printf("Key %d pressed\n", ev.Key)
+				r := uint8(rand.IntN(256))
+				g := uint8(rand.IntN(256))
+				b := uint8(rand.IntN(256))
+				dev.SetKeyColor(ev.Key, color.RGBA{r, g, b, 255})
+			} else {
+				fmt.Printf("Key %d released\n", ev.Key)
+			}
+		case <-sig:
+			fmt.Println()
+			return
+		}
+	}
+}