Add Vishay PowerPAK MLP55-27L and MLP55-27L_r 3d models

Thanks for creating a pull request to contribute to the KiCad libraries! Remember you must be the legal owner of the 3D model! Models downloaded from a manufacturers website cannot be accepted.

Add Vishay PowerPAK MLP55-27L and MLP32-55G_R package 3d. MLP55-27L_R is package MLP55-27L modification with short 15 pin for models:

• sic461, sic462, sic463, sic464 https://www.vishay.com/docs/65124/sic46x.pdf

MLP55-27L for models:

• sic466, sic467, sic468, sic469: https://www.vishay.com/docs/76044/sic46x.pdf
• sic471, sic472, sic473, sic474: https://www.vishay.com/docs/75786/sic47x.pdf
• sic476, sic477, sic478, sic479: https://www.vishay.com/docs/77113/sic47x.pdf

• Link to the package3d sources pull request
• Link to the footprint pull request
• Link to the symbol pull request

To speed up integration of your PR, please check the following items as you complete them:

• [+] A screenshot of the model(s) aligned with KiCad footprint(s)
• [+] Source files are contributed on the apropriate location
  • Link to the package3d-source pull request
  • Link to the footprint pull request
  • Link to the symbol pull request
• [+] Step model submitted in 1:1 scale
• [+] WRL model submitted in 1:2.54 scale
• [+] 3D model alignment checked against KiCad footprint
• [+] WRL model uses correct material properties
• [+] Geometry check performed on the model