Fonts docs

[m0ksem]

We don't have any docs about fonts. We need new page in /services.

Here add --va-font-family font, how to change one, which one we use by default.

Write what font-weight do we use in UI.

Also, update create-vuestic and nuxt module to use correct font import.
https://fonts.googleapis.com/css2?family=Source+Code+Pro&family=Source+Sans+Pro:wght@400;700;800&display=swap

[starredev]

800 does not exist for source code pro, do you mean 900 instead?

[m0ksem]

For code, I think default font-weight is enough. I think no one uses bold Code font. Actually, code font can be removed. We use it in docs, but in user-facing application there is a small chance anyone will use it.