[FEATURE] GPU support when multiple GPUs are present

[ingrinder]

Is your feature request related to a problem? Please describe. Currently only one GPU appears in Archey's output. For example, my PC has a dedicated Nvidia GTX 970 + the integrated Intel UHD 630 GPU. When I run Archey, it displays GPU: Intel Corporation UHD Graphics 630 (Desktop), with no mention of my Nvidia GPU.

Describe the solution you'd like One of these would be ideal:

• Display both GPUs (this might be what someone with multiple discrete GPUs wants)
• Have the ability to display the GPU of my choice (i.e. the dedicated one in my case).

Describe alternatives you've considered I could disable the integrated graphics, however I use it with IOMMU for virtual machines so I would prefer to keep it enabled and have the ability to display my dedicated GPU.

Additional context The output of lspci | egrep "3D|VGA|Display" is:

00:02.0 Display controller: Intel Corporation UHD Graphics 630 (Desktop)
01:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1)

[HorlogeSkynet]

Closing as #71 is now on its way.