enh: trying to add fdf as read_geometry default
enh: trying to add fdf as read_geometry default

This should work in most cases, unless MD simulations exists
without basis information (I think)...

Signed-off-by: Nick Papior <81a73bca3d342ffee33d7cf845fdbf77b6553831@gmail.com>

zerothi/sisl,zerothi/sisl