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

Add Vishay PowerPAK MLP55-27L and MLP55-27L_R package 3d source in FreeCad format. It's made natively Package datasheet: https://www.vishay.com/docs/75269/ppak_mlp55-27l.pdf

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