refactor: export Seo and Viewport components

Author: Je

mod.ts

@@ -1,7 +1,7 @@
 export { AppManifestContext } from './app.ts'
 export * from './data.ts'
 export { ErrorPage } from './error.ts'
-export { default as Head } from './head.ts'
+export { default as Head, SEO, Viewport } from './head.ts'
 export { default as Link } from './link.ts'
 export * from './router.ts'