Add Fortinet shapes

[JEDIMrWick]

Hello draw.io Team,

I would like to be able to use the visio shapes in your platform. When I import them over half of them are jsut black lines. The shapes allow the ability to map each individual port per model of firewall and other fortinet devices.

Thank you for your time to consider this matter and for your continuous efforts to improve the draw.io platform.

https://www.fortinet.com/content/dam/fortinet/assets/downloads/Fortinet%20Visio%20Stencil.zip