Add wgpu to vendor section on the landing page

[thetarnav]

[gingerBill]

The WebGPU logo needs to look good in dark mode too.

[thetarnav]

just the mark looks good in both light and dark modes

otherwise to have the logotype, there would have to be two images, one with white text, switched between based on the dark-mode class?

nwm there is also a nice logotype svg that could work

[thetarnav]

had to inline the logo to modify it with a new dark-mode-fill-white class

[gingerBill]

Wonderful!