feat(night-mode): 🌙 Switch from wlsunset to hyprsunset and add temperature control

- Replace wlsunset with hyprsunset for better Hyprland integration
- Add temperature adjustment functions with scroll support in Waybar
- Implement persistent temperature storage in `~/.cache/hyprsunset_temp`
- Add temperature bounds (2000K-6500K) with 100K increment/decrement
steps
- Update NixOS configuration to include hyprsunset package

Fixes temperature persistence and improves Hyprland compatibility

home/.config/waybar/config

@@ -223,7 +223,10 @@
 
     "custom/night_mode": {
         "return-type": "json",
-        "interval": 1,
+        "restart-interval": 1,
+        "on-scroll-down": "fish -c night_mode_temp_up",
+        "on-scroll-up": "fish -c night_mode_temp_down",
+        "smooth-scrolling-threshold": 2.0,
         "exec": "fish -c check_night_mode",
         "on-click": "fish -c night_mode_toggle",
     },