Use @nuxt/image to generate multiple versions of a favicon

[jojomatik]

Is your feature request related to a problem? Please describe.
Each and every browser, OS and other use cases require different sizes of the favicon. It is tedious to create them manually.

Describe the solution you'd like
We should try to create these versions automatically with @nuxt/image and implement them in the head.

Describe alternatives you've considered
Create a nuxt plugin that takes care of this or improve @nuxt/image.

Additional context
nuxt/image#975