Added Traco TEA1 footprint script

Hello everyone 😄

This is my first footprint script for TEA1 series. There are still some things to do but I would need some help.

Datasheet: https://www.tracopower.com/products/tea1.pdf (see last page for the footprint)

MR Footprint: kicad-footprints!3259 (merged)

MR Symbol: kicad-symbols!4004 (merged)

The footprint currently looks like this:

Thank you very much!

Jens