chore: bump site-kit, use new components (#9535)

* chore: bump site-kit, use new components

- removed most of search as it's now part of site-kit
- use new shell/separator components
- adjust NavItem usages

* oops

* oh

* bump, use barrel exports

* fix type usage

Author: dummdidumm

pnpm-lock.yaml

@@ -14,7 +14,7 @@
 		"@sveltejs/adapter-vercel": "workspace:^",
 		"@sveltejs/amp": "workspace:^",
 		"@sveltejs/kit": "workspace:^",
-		"@sveltejs/site-kit": "^3.1.0",
+		"@sveltejs/site-kit": "^3.3.6",
 		"@types/d3-geo": "^3.0.2",
 		"@types/node": "^16.18.6",
 		"flexsearch": "^0.7.31",