README first screen and CITATION.cff (#369)

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++cff-version: 1.2.0
++message: "If you use OpenVibe.Bot in research or a product, cite it as below."
++title: openvibe-bot
++type: software
++authors:
++  - name: OpenVibe
++    alias: OpenVibers
++    website: https://openvibe.network
++repository-code: https://github.com/OpenVibers/OpenVibe.Bot
++url: https://openvibe.bot
++license: AGPL-3.0-only
++abstract: "Pair a robot in minutes and drive it safely from a browser, from anywhere, at openvibe.bot."
++keywords:
++  - openvibe
++  - control-panel
++  - iot
++  - nodejs
++  - raspberry-pi
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  The open control panel for robots (openvibe.bot). Design: OpenVibe.Contracts docs/adr/ADR-043-bot-devices-and-control.md; plan track T15.
  
++**Live site:** https://openvibe.bot · **API docs:** https://openvibe.services · **For AI:** https://openvibe.bot/llms.txt
++**Run it:** `npm ci && npm run dev` (Node 22 or newer) · **Tests:** `npm test`
++
  ## Purpose
  
  OpenVibe.Bot pairs a robot's machines, keeps their state and gates every operator command. A device opens one outbound WebSocket to `/device`; a person drives it from `/control` or the REST API, through the same gate — roles, per-robot limits, cooldowns and the turn budget — over a panel built from the robot's profile rather than per-robot code.