[Epic for website] Broken links and website bugs introduced post Nuxt 3 migration

[anna-geller]

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1. How-to Guide Search isn't working #2227
   area/frontend bug +2
   
2. Broken link when navigating to it directly https://kestra.io/docs/configuration
3. Broken link when navigating to it directly https://kestra.io/docs/expressions
4. Broken link when navigating to it directly https://kestra.io/docs/ee-server-cli

[elevatebart]

this should be fixed now, thank you anna