feat: add basic game over state

game/state/handlers/gameover.go

@@ -0,0 +1,30 @@
+package handlers
+
+import (
+	"tetris/engine/render"
+	"tetris/game/state"
+
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+type GameOver struct{}
+
+func (GameOver) Enter() {
+}
+
+func (GameOver) Exit() {
+}
+
+func (GameOver GameOver) Update(fsm state.Transitioner, delta float32) {
+	if rl.IsKeyPressed(rl.KeyEnter) {
+		fsm.Switch("gameplay")
+	} else if rl.IsKeyPressed(rl.KeyQ) {
+		fsm.Switch("menu")
+	}
+}
+
+func (GameOver *GameOver) Render() {
+	render.Begin(rl.Black)
+	render.DrawText(250, 200, 32, "Game Over", rl.White)
+	render.End()
+}