feat(facilitators): add AlgoVoi multi-protocol facilitator (8 networks)

[chopmob-cloud]

What this adds

A single bullet under Facilitators & Networks for AlgoVoi — a multi-protocol (x402 + MPP + AP2 + A2A) facilitator covering 8 mainnet networks: Base, Solana, Stellar, Algorand, VOI, Hedera, Tempo, and ARC.

Why it fits

• Broadest network coverage in the facilitators section: the only entry supporting Stellar, Algorand, VOI, Hedera, Tempo, and ARC behind a single x402 endpoint.
• xChain bridge UX — agents holding USDC on any of 7 EVM source chains (Base, Arbitrum, Polygon, Optimism, Ethereum, BNB, Avalanche) can pay AlgoVoi-protected resources from MetaMask without a destination-chain wallet.
  • Solana: Circle CCTP V2 (~50s native USDC)
  • Stellar: Allbridge Core → canonical Circle USDC at issuer GA5ZSEJ…
  • Algorand: deterministic LogicSig pattern
• Compliance-aware: open attestation at GET /compliance/attestation and pre-payment screening — the first Bazaar-listed facilitator with built-in AML gates.
• pay.sh-compatible catalog — AlgoVoi is listed in the Solana Foundation pay-skills registry.

Live verification

# 402 probe — returns multi-chain accepts[]
curl -sI https://api.algovoi.co.uk/mpp/probe | grep -i payment

# pay.sh catalog
curl -s https://api.algovoi.co.uk/.well-known/pay-skills.json | jq '{version, base_url}'

Happy to address any feedback.

[chopmob-cloud]

Rebased onto current upstream/master (8ee4048) to clear the merge-conflict status.

Diff is now minimal — just the 3-line AlgoVoi entry inserted after Corbits in the Facilitators section:

git diff --stat upstream/master..HEAD
 README.md | 3 +++
 1 file changed, 3 insertions(+)

Same content as before, just re-applied cleanly onto current master. Ready for review.