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

.gitignore

@@ -0,0 +1,33 @@
+# Environment variables
+.env
+.env.local
+
+# SSL Certificates & Private Keys
+certbot/
+*.pem
+*.key
+*.crt
+
+# Databases & User Data
+data/*.db
+data/*.sqlite
+data/*.sqlite3
+
+# System & Server Internal Notes
+NOTES.md
+GEMINI.md
+SESSION_CHECKPOINT.md
+_backup_pre_pvz/
+snap/
+
+# Python & Node Caches
+__pycache__/
+*.py[cod]
+*$py.class
+node_modules/
+.npm/
+
+# OS and Logs
+*.log
+.DS_Store
+Thumbs.db