bosses' addition

### **📜 Version 1.2 Changelog - "The Final Challenge"**  
🔥 **New Additions:**  
- **Final Boss - The Soul Harvester** is now in the game! This **massive, powerful undead** wields the **Soul Reaper Bow** and wears the **Wraith Crown**.  
- Spawns **10 blocks above the nearest player** and comes equipped with **Netherite Armor**, enchanted gear, and a **Totem of Undying**.  
- Has **500 HP**, **Regeneration**, and a **warning message** upon spawning.  
- Summon it with `/trigger finalboss`.

⚙️ **Changes & Improvements:**  
- **Boss Scaling Tweaks** – Adjusted some attributes for better balancing.  
- **Performance Optimizations** – Improved function execution for smoother gameplay.

🐛 **Bug Fixes:**  
- Fixed some bosses **not properly equipping their weapons**.  
- Resolved an issue where bosses **could sometimes despawn unexpectedly**.

💀 **Can you survive the Final Boss?**