Towers not saved between sessions

Currently, the list of available towers and the player’s selected towers are not saved or loaded between sessions. As a result, when the game is restarted, tower selections reset to default, and player progress regarding unlocked or chosen towers is lost.

• When exiting and restarting the game, the available towers and selected towers should be restored exactly as before.
• The uninitialize() method should be updated to properly save this data before shutdown.
• When initializing the game, it should load the saved tower state.

Priority: Low