added implementation in GO lang

internal/modes/mode.go

@@ -0,0 +1,25 @@
+package modes
+
+import (
+	"math/rand"
+
+	"github.com/hajimehoshi/ebiten/v2"
+
+	"kidskeyboard/internal/assets"
+	kbaudio "kidskeyboard/internal/audio"
+)
+
+type Context struct {
+	Audio  *kbaudio.Manager
+	Assets *assets.Manager
+	RNG    *rand.Rand
+}
+
+type Mode interface {
+	Name() string
+	OnEnter()
+	OnLeave()
+	HandleInput()
+	Update()
+	Draw(screen *ebiten.Image)
+}