Add Resource: Vessel (managed OpenClaw hosting)

[mehulbhardwaj]

Resource: Vessel
Section: Deployment and Operations > Managed Hosting and Setup
Description: Secure, fully managed OpenClaw hosting on dedicated VMs. Zero ops, VM-level isolation, no exposed ports.
Relevance: Managed hosting provider for OpenClaw with a security-first approach (dedicated VMs instead of shared containers, tunnel-based networking, automated hardening).