feat(config/hypr/configs): add XCURSOR_THEME cursor theme

Add Bibata-Modern-Ice theme for improved cursor rendering

New Features- Introduce XCURSOR_THEME configuration variable with default value "Bibata-Modern-Ice".
- Extend backend settings to include the new theme.

Enhancements- Update configuration table to reflect theme and backend preferences.

Bug Fixes
- No bug fixes in this change.

config/hypr/configs/monitor_and_env.lua

@@ -23,6 +23,7 @@ end)
 
 for key, val in pairs({
 	XCURSOR_SIZE = "6",
+	XCURSOR_THEME = "Bibata-Modern-Ice",
 	GDK_CURRENT_DESKTOP = "wayland",
 	CLUTTER_BACKEND = "wayland",
 	GDK_BACKEND = "wayland,x11,*",