v0.8.0 Playable!

Now playable!

• The game has now been rewritten in bevy!
• The rules are now coded so we have the main game logic in place
• We are using Hill tetrahedron!
• You can save/load universes
• Game seems to well up until 130^3 grids

Controls:

• W/S: Move forward/backward
• A/D: Rotate left/right
• ↑ ↓ arrows: Move up/down
• ← → arrows Move left/right
• 1️2️3️4️5️6️ to place or remove life
• 🅿️ Pause/Resume
• ➕ / ➖ Adjust game speed
• K/L: Save / Load