feat(i18n): add Dutch (nl) locale (#4100)

* feat(i18n): add Dutch (nl) locale

* fix(i18n): sync Dutch translations with main and correct wording

* docs(i18n): translate all documentation pages into Dutch

* fix(i18n): sync Dutch translations with latest main

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Co-authored-by: Iuliia Ivashko <yulia.ivashko@gmail.com>