Coilcraft POE30P-x, POE70P-x and POE13P-x symbols

Created by: ppielorz

Added POE30P-x, POE70P-x and POE13P-x symbols with aliases regarding output voltage. Datasheet: https://www.coilcraft.com/pdfs/poe_ep.pdf

POE13P screenshot:

POE70P screenshot:

POE30P screenshot:

Footprints PR: https://github.com/KiCad/kicad-footprints/pull/1947

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All contributions to the kicad library must follow the KiCad library convention

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

• Provide a URL to a datasheet for the symbol(s) you are contributing
• An example screenshot image is very helpful
• Ensure that the associated footprints match the official footprint library
  • A new fitting footprint must be submitted if the library does not yet contain one.
• If there are matching footprint PRs, provide link(s) as appropriate
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