Add Genesys iframe example files for agent assist embed security

[devinturner-ibm]

Adds example server-side files for embedding watsonx Orchestrate agent assist inside a Genesys application using OAuth Authorization Code Grant with PKCE.

What's included

• src/server.js — Express server with a /createJwt endpoint
• src/create-jwt.js — Exchanges a Genesys OAuth code for a signed RS256 JWT
• static/agentAssistEmbed-genesys.html — Outer iframe that handles the PKCE OAuth flow
• static/agentAssistEmbed.html — Inner iframe that loads the wxO agent assist dashboard
• keys/ — Example RSA key pair for local testing (not for production use)
• package.json — Node.js dependencies

Notes

• Example keys are for local development only — customers should generate their own keypair
• ALLOWED_ORG_IDS in create-jwt.js must be updated with the customer's Genesys org ID before use
• These files are intended to be linked from product documentation