Add TQFN-44-1EP_7x7mm_P0.5mm_EP4.7x4.7mm

See also:

• kicad-symbols!4385
• kicad-footprints!3560 (merged)
• kicad-packages3D-generator!166 (merged)
• kicad-packages3D!981 (merged)

Datasheet:

• https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/tqfn/21-0144.pdf

This MR contains a new part + minor/cosmetic changes of a related part from the same sheet. I can split them, or clean-up commits before merge (and then avoid squashing).