feat(ui): add animated stat counters

[Emelie-Dev]

closes #508

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[ezedike-evan]

Two things to fix before this can merge:

1. Commit message — Add animated stat counters doesn't follow Conventional Commits. Please use a type prefix, e.g. feat(landing): add animated stat counters and push.
2. CI not triggered — no checks are running. Please push an empty commit or close and reopen to trigger GitHub Actions.

[Emelie-Dev]

Good day, I've updated the commit and pushed a new commit, but the GitHub Actions checks still aren't being triggered on my fork.

[ezedike-evan]

Thanks for adding the conventional-commit prefix — almost there. Two remaining CI failures:

1. commitlint — the commit uses scope landing, which isn't in the allowed scope list. landing isn't one of our tracked modules; please use ui instead (e.g. feat(ui): add animated stat counters) and amend/force-push.
2. lint-pr-title — the PR title "Add animated stat counters" also needs a Conventional Commits prefix, e.g. feat(ui): add animated stat counters. Please update the title to match.

Implementation itself (useCountUp hook, reduced-motion handling) looks good and matches #508 — just these two lint fixes needed.