feat: engine setup

cmd/main.go

@@ -1 +1,30 @@
-package main
+package main
+
+import (
+	"log"
+
+	"github.com/hajimehoshi/ebiten/v2"
+	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
+)
+
+type Game struct{}
+
+func (g *Game) Update() error {
+	return nil
+}
+
+func (g *Game) Draw(screen *ebiten.Image) {
+	ebitenutil.DebugPrint(screen, "Hello world")
+}
+
+func (g *Game) Layout(outsideWidth, outsideHeight int) (screenWidth, screenHeight int) {
+	return 320, 240
+}
+
+func main() {
+	ebiten.SetWindowSize(640, 480)
+	ebiten.SetWindowTitle("Hello world")
+	if err := ebiten.RunGame(&Game{}); err != nil {
+		log.Fatal(err)
+	}
+}