feat: Initial commit Plants vs Zombies Web Edition v2.4

- 5 Biomes: Day, Night, Pool, Fog, Roof (25 Campaign levels)
- Minigames: Wall-nut Bowling, I Zombie, Roguelike, Boss Rush & Dr. Zomboss
- Systems: Zen Garden, Workshop Crafting, Almanac, Tree of Wisdom, Achievements
- Backend: REST API + SQLite Accounts & Save Synchronization
- Infrastructure: Nginx HTTPS & Docker deployment

Dockerfile

@@ -0,0 +1,4 @@
+FROM nginx:alpine
+COPY game/ /usr/share/nginx/html/
+COPY nginx/conf.d/ /etc/nginx/conf.d/
+EXPOSE 80 443