feat(examples): add img2term example

Only writes Sixel images for now

examples/img2term/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"image"
+	"io"
+	"log"
+	"os"
+
+	_ "image/jpeg"
+	_ "image/png"
+
+	"github.com/charmbracelet/x/ansi"
+	"github.com/charmbracelet/x/ansi/sixel"
+)
+
+func main() {
+	flag.Parse()
+	args := flag.Args()
+	if len(args) == 0 {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	f, err := os.Open(args[0])
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	defer f.Close() //nolint:errcheck
+	img, _, err := image.Decode(f)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if _, err := writeSixel(os.Stdout, img); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func writeSixel(w io.Writer, img image.Image) (int, error) {
+	var buf bytes.Buffer
+	var e sixel.Encoder
+	if err := e.Encode(&buf, img); err != nil {
+		return 0, err
+	}
+
+	return io.WriteString(w, ansi.SixelGraphics(0, 1, 0, buf.Bytes()))
+}