Added LFCSP-16-1EP_3x3mm_P0.5mm_EP1.5x1.5mm

This MR adds the LFCSP-16-1EP_3x3mm_P0.5mm_EP1.5x1.5mm required for kicad-footprint-generator!1092 (merged)

Datasheet: https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/lfcspcp/cp-16/cp_16_27.pdf 3D model MR: kicad-packages3D!996 (merged)

Edit: Updated the link to the ADI page. They decided to change the links, without redirecting the old ones, in their infinite wisdom. Edit2: Changed name from DFN to LFCSP