README first screen and CITATION.cff (#98)

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++cff-version: 1.2.0
++message: "If you use OpenVibe.Casino in research or a product, cite it as below."
++title: openvibe-casino
++type: software
++authors:
++  - name: OpenVibe
++    alias: OpenVibers
++    website: https://openvibe.network
++repository-code: https://github.com/OpenVibers/OpenVibe.Casino
++url: https://openvibe.casino
++license: AGPL-3.0-only
++abstract: "Casino games that teach the odds, played with chips worth nothing, at openvibe.casino."
++keywords:
++  - openvibe
++  - casino
++  - education
++  - gambling
++  - games
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  > Learn it, play it, never pay it.
  
++**Live site:** https://openvibe.casino · **API docs:** https://openvibe.services · **For AI:** https://openvibe.casino/llms.txt
++**Run it:** `npm ci && npm run dev` (Node 22 or newer) · **Tests:** `npm test`
++
  **Domain:** `openvibe.casino` · **Port:** 5210 · **Service id:** `casino` · **Env prefix:** `CASINO`
  
  Every casino game with its insides showing: the rules, the exact odds and what each bet costs, tables you can play with