[wrangler] Add vpc_networks binding support

[RiscadoA]

Adds vpc_networks binding support, allowing Workers to route traffic through a Cloudflare Tunnel. At runtime, env.MY_VPC.fetch("http://internal-host/") routes through the tunnel. Each binding generates a Fetcher type. Like vpc_services, these bindings are always remote in wrangler dev.

{
  "vpc_networks": [{ "binding": "MY_VPC", "tunnel_id": "your-tunnel-uuid" }]
}

---

• Tests
  • Tests included/updated
• Public documentation
  • Documentation not necessary because: internal feature, not yet GA

[changeset-bot]

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Latest commit: db9567c

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