fix: escape html entities in social description + show illustration on en & ru routes
Created by: fubits1
- website description (also show in the social media & google result previews) in UKR had special characters (a variant of ' ) that were auto-escaped as HTML entities, but then also rendered as entities (see screenshot). The workaround escapes HTML entities.
- the decorative illustration was only displayd on the "/" route, but not on "/en/" and "/ru/".
Preview: https://dcomms-astro-2023-git-development-fubits.vercel.app/