feat: add Hono framework verification example

[dev8967]

Summary

• add a runnable Hono framework example under examples/frameworks/hono
• include APort-style policy middleware with agent ID extraction from headers, query params, body, and static options
• add refund/admin route examples, setup docs, environment sample, and node:test coverage with an injected mock client

This contributes to #22 with a framework that is not already covered by the existing Express/FastAPI middleware paths.

Validation

• npm install
• npm test (8 tests passing)