Add About & Colophon Pages

[dannysmith]

About Page

• Brief description
• Full links to all socials (currently on homepage)
• Largeish image

Colophon Page

Checklist

• About Page
• Colophon Page
• Ensure src/config/seo.ts marries up with content of about page.
• Add link to About to MainNavigation.astro
• Add links to About and Colophon to Foter.astro
• Add brief SEO-friendly "about me" paragraph to Footer.astro including a brief description of who I am etc and "hi [at] danny [dot] is".