Feature Request: TypedArray support in REG_PROPERTY

[chocola-mint]

(I'll work on this when the master branch becomes stable again)

GDExtension supports typed arrays as seen here. However, property hints need to be injected. (PROPERTY_HINT_ARRAY_TYPE, with the hint string being the element type)

It'd be nice if we can automate this conversion.

So this:

REG_PROPERTY()
TypedArray<Node> nodes; // The element type has to be a registered type. (Exposed to ClassDB) Nested typed arrays are valid too.

Would correspond to something like this: (Ignoring generated prefixes here for brevity)

Array get_nodes() const { return nodes; } // There's a built-in conversion from TypedArrays to Arrays.
void set_nodes(Array p) { nodes = p; } // There's a built-in conversion from Arrays to TypedArrays.

ClassDB::bind_method(D_METHOD("set_nodes", "nodes"), &set_nodes);
ClassDB::bind_method(D_METHOD("get_nodes"), &get_nodes);
ADD_PROPERTY(PropertyInfo(Variant::ARRAY, "nodes", PROPERTY_HINT_ARRAY_TYPE, "Node"), "set_nodes", "get_nodes");

In GDScript, the user will see the property's type as Array[Node].