Hint int property is a Variant type enumeration

[timothyqiu]

Currently no way to specify a int export variable is any of TYPE_INT, TYPE_ARRAY, TYPE_AABB, etc.

Editor code (e.g. AnimationTrackKeyEdit and TileSet) hints the variable is an enum, and populates the enum hint with the corresponding Variant type names. This tedious to do in GDScript as Variant::get_type_name() is not exposed.

I think there're two ways to implement this:

1. Expose Variant::get_type_name() so the user can fill enum hint easily.
2. Add a PROPERTY_HINT_INT_IS_VARIANT_TYPE hint.

[dalexeev]

1. Now there is type_string(). See Add type_string() utility godot#69624.
2. It's PropertyInfo(Variant::INT, "prop_name", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_CLASS_IS_ENUM, "Variant.Type").

In GDScript you can also use @export var type: Variant.Type: