Remove all date/time-related dependencies from the ui except `dayjs` and
use `dayjs` for all tasks.
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
1. new translation docs
2. lazy-load TimeAgo locales (used for "x min ago" messages). This 1.
reduces size and 2. provides all languages without adding them manually.
3. Remove DayJS locales, they're unused.
