Matrix GNs: Access to the W component of transformed vectors

PLEASE just let us have access to the w component of the resulting vector in the new Transform Point geometry node (and maybe the others)!

On top of having its vector output, just add a float output that represents the w component of the resulting vector. It seems like it'd be a very easy thing to add.

It would enable proper perspective projection, since the current implementation of the Project Point node uses the absolute value of the (currently inaccesible) w component, instead of its signed value.

For my particular use case, it would unlock the recreation of all kinds of graphics programming demonstrations, ways to visualize transformations and other operations that involve the w component.