Add a property hint to Environment's `sky_rotation` property

This property hint is identical to Node3D's `sky_rotation` property
and provides degree-based editing.

scene/resources/environment.cpp

@@ -1179,7 +1179,7 @@ void Environment::_bind_methods() {
 	ADD_GROUP("Sky", "sky_");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "sky", PROPERTY_HINT_RESOURCE_TYPE, "Sky"), "set_sky", "get_sky");
 	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "sky_custom_fov", PROPERTY_HINT_RANGE, "0,180,0.1,degrees"), "set_sky_custom_fov", "get_sky_custom_fov");
-	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "sky_rotation"), "set_sky_rotation", "get_sky_rotation");
+	ADD_PROPERTY(PropertyInfo(Variant::VECTOR3, "sky_rotation", PROPERTY_HINT_RANGE, "-360,360,0.1,or_lesser,or_greater,radians"), "set_sky_rotation", "get_sky_rotation");
 
 	// Ambient light