Improve SEO

[jaakkonakaza]

We'll likely save SEO for the late stage polish phase closer to launch. Part of SEO includes the social banners and such, so we'll want to ensure the design is finalized before we commit to all this.
#65

https://kit.svelte.dev/docs/seo

#88 adds automatic page titles, improve later?

[endigo9740]

For future reference: https://github.com/skeletonlabs/skeleton/blob/dev/sites/skeleton.dev/src/routes/%2Blayout.svelte#L172