feat(scala): m11 pong capstone (model, rules, view, app) with tests

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scala/solutions/pong/View.scala

@@ -0,0 +1,29 @@
+package snake
+package pong
+
+import PongModel.*
+
+/** m11 pong view: the same Scene shapes as the snake view, so the same drawScene and runtime draw it. */
+object PongView:
+
+  private def text(x: Int, y: Int, str: String, size: Int): Shape = Shape.Text(x, y, str, "#ffffff", size, "center")
+
+  private def paddle(column: Int, y: Int): Shape =
+    Shape.Rect(column * PCELL, y * PCELL, PCELL, PADDLE * PCELL, "#ffffff")
+
+  private def overlay(state: PongState): Scene = state.status match
+    case PongStatus.Over =>
+      List(
+        text(320, 200, if state.score.player > state.score.cpu then "You Win!" else "CPU Wins", 32),
+        text(320, 230, "Press R to restart", 16)
+      )
+    case PongStatus.Playing => Nil
+
+  def pongView(state: PongState): Scene =
+    List(
+      Shape.Rect(0, 0, 640, 400, "#111111"),
+      paddle(PLAYER_X, state.player),
+      paddle(CPU_X, state.cpu),
+      Shape.Rect(state.ball.x * PCELL, state.ball.y * PCELL, PCELL, PCELL, "#ffeb3b"),
+      text(320, 30, s"${state.score.player}   ${state.score.cpu}", 24)
+    ) ++ overlay(state)