feat: add RelayShield identity threat intelligence plugin

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Summary

Adds RelayShield as a community plugin — identity threat intelligence
for GAME agents.

Wraps all 9 RelayShield security tools as GAME-compatible Functions
so agents can check identity threats before acting on user input,
executing transactions, or processing links and files.

Tools

• check_breach — email breach lookup via HIBP ($0.10 USDC)
• check_sim_swap — SIM swap / eSIM detection, live carrier data ($0.25 USDC)
• check_domain_lookalikes — typosquat / phishing domain scan ($0.50 USDC)
• check_oauth_watchlist — breached OAuth app exposure ($0.15 USDC)
• check_infostealer — near real-time infostealer malware detection; identifies device compromise via RedLine, Raccoon, Vidar and similar credential-harvesting trojans ($0.15 USDC)
• scan_wallet — on-chain wallet risk via GoPlus Security ($0.10 USDC)
• scan_url — malware / phishing URL scan, 70+ engines ($0.05 USDC)
• scan_file — binary malware scan, 70+ AV engines ($0.10 USDC)
• check_scan_result — poll async scan result (free)

Payment

Pay-as-you-go via x402 USDC on Base — no subscription required.
Also available via RapidAPI subscription for lower per-call cost.

Configuration

Three environment variables:

• RELAYSHIELD_API_URL — API Gateway base URL (required)
• RELAYSHIELD_API_KEY — RapidAPI subscription key (optional)
• RELAYSHIELD_X_PAYMENT — x402 payment proof, USDC on Base (optional)

Usage

from plugins.relayshield.relayshield_game_plugin import relayshield_functions
worker = Worker(id="security_worker", functions=relayshield_functions, ...)

Live on RapidAPI: https://rapidapi.com/relayshielduser/api/relayshield-security-intelligence