Add analytics to website

[jhult]

I believe Google Analytics is planned to be used, but just in case, here are some alternatives:

• https://github.com/plausible/analytics
• https://github.com/umami-software/umami
• https://github.com/matomo-org/matomo
• https://github.com/PostHog/posthog
• https://github.com/usefathom/fathom

[jhult]

Closed via https://github.com/Granola-Team/mina-block-explorer/pull/234