feat: add Pocket Dungeon game prototype

Apps/PocketDungeon/main/Source/DungeonModel.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include <GameKitGrid.h>
+#include <cstdint>
+
+namespace PocketDungeon {
+
+static constexpr uint8_t DUNGEON_COLS = 9;
+static constexpr uint8_t DUNGEON_ROWS = 7;
+static constexpr uint8_t MAX_ENTITIES = 8;
+
+enum class Tile : uint8_t { Floor, Wall, Stairs, Treasure };
+enum class EntityType : uint8_t { Player, Slime, Bat };
+enum class MoveResult : uint8_t { None, Moved, Blocked, Attacked, Treasure, Stairs, Dead };
+
+struct Entity {
+    EntityType type = EntityType::Slime;
+    GameKit::GridPos pos {};
+    int8_t hp = 1;
+    bool alive = false;
+};
+
+struct DungeonState {
+    Tile tiles[DUNGEON_ROWS][DUNGEON_COLS] {};
+    Entity entities[MAX_ENTITIES] {};
+    uint8_t entityCount = 0;
+    GameKit::GridPos playerPos {1, 1};
+    uint16_t floor = 1;
+    uint16_t gold = 0;
+    int8_t hp = 5;
+    bool gameOver = false;
+};
+
+class DungeonModel {
+    DungeonState state {};
+    uint32_t seed = 0xC0FFEE;
+    uint16_t bestFloor = 1;
+    uint16_t bestGold = 0;
+
+    uint32_t nextRandom();
+    void addEnemy(EntityType type, GameKit::GridPos pos, int8_t hp);
+    int findEnemyAt(GameKit::GridPos pos) const;
+    bool isWalkable(GameKit::GridPos pos) const;
+    void moveMonsters();
+
+public:
+    void reset(uint32_t seedValue = 0xC0FFEE);
+    void generateFloor();
+    MoveResult movePlayer(int dx, int dy);
+
+    const DungeonState& getState() const { return state; }
+    uint16_t getBestFloor() const { return bestFloor; }
+    uint16_t getBestGold() const { return bestGold; }
+    void setBests(uint16_t floor, uint16_t gold) { bestFloor = floor; bestGold = gold; }
+};
+
+} // namespace PocketDungeon