feat(webkit): add the client-kpi-quote marketing component

[gabriel-lisboa-azion]

Summary

• One cell of customer proof: the client's mark, the result that client got, and the sentence stating it. It is how a marketing page signs a number — the figure leads the claim in the default ink, the rest of the line runs muted behind it, and the mark above says whose workload it came from.
• Public exports: @aziontech/webkit/client-kpi-quote.

How to test

1. pnpm storybook:dev → open Components/Marketing/ClientKpiQuote. Every story renders, and "Show code" is a runnable SFC you can paste.
2. pnpm --filter @aziontech/webkit test -- src/components/marketing/client-kpi-quote → the co-located browser suite passes.
3. pnpm webkit:type-check → clean.

Notes

• No dependency on another marketing PR; it can merge in any order.
• Targets feature/marketing-components, which carries the shared foundation (marketing category registration, illustration scene registry, theme tokens, story assets).
• No breaking change: nothing is removed or renamed on main.

[gabriel-lisboa-azion]

Closing: client-kpi-quote is dropped from the marketing set. Its figure-first claim now lives in quote's highlights (#1012), and its card-per-client role is covered by quote-tabs (#1042). Jira ENG-48219 is archived.