Added Barreljack horizontal

[gumyns]

Model for BarrelJack_Horizontal, I believe it's a pretty common one.

I've used this spec as reference: https://botland.com.pl/pl/index.php?controller=attachment&id_attachment=480

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Thanks for creating a pull request to contribute to the KiCad libraries! 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 footprints is very useful
• Was the 3D model(s) created in a mechanical modeling program?
• Source files (or scripts) have been contributed
• 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 against mechanical models (I'm not sure how to do that...)

[claassistantio]

All committers have signed the CLA.

[poeschlr]

I assume you designed this yourself in some cad program. Could you create a pull request for that over on the https://github.com/KiCad/kicad-packages3D-source repo? (and link from this pull request to the source pull request and vice versa.)

[gumyns]

Yes, sure. KiCad/kicad-packages3D-source#264

[Franck78]

I would tag this "missing valid source" ;)

The barrel itself is not 3d source but an imported propably .step