Add MSOP-8 and UDFN-8 packages for AP2152A and AP2142A

Source code for generating MSOP-8 and UDFN-8 packages for AP2152A and AP2142A power switching ICs.

Related merge requests:

• kicad-symbols!3168
• kicad-footprints!2569 (merged)
• kicad-packages3D-generator!2 (merged)

Datasheets:

• MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm
  • https://www.diodes.com/assets/Package-Files/MSOP-8EP.pdf
• DFN-8-1EP_3x3mm_P0.65mm_EP1.5x2.25mm
  • https://www.diodes.com/assets/Package-Files/U-DFN3030-8-Type-E.pdf