Implement nuxtseo and fix trailing slash redirect

[ViliusP]

Chrome lighthouse shows redirects: "website.com/page" -> "website.com/page/" -> "website.com/page/"

• https://nuxtseo.com
• https://docs.netlify.com/routing/redirects/redirect-options/#trailing-slash
• https://github.com/nuxt/nuxt/releases/tag/v3.8.0 (paragrah "🔗 NuxtLink defaults")
• https://nuxt.com/docs/api/components/nuxt-link#in-nuxt-config