dsh-infra-bootstrap: Infrastructure Readiness Probing and Status Reporting

`dsh-infra-bootstrap` is a DSH plugin developed by Bryan-cmf that automatically probes the status of infrastructure components before task execution to avoid missed manual checks. It provides the `infra_status` and `infra_bootstrap` tools, which check components such as vectorMemory, search services, and skill directories to output a structured readiness report (PASS/WARN). The plugin requires DSH version >= 0.1.0-rc.6 and helps users quickly verify environment connectivity before starting an agent workflow.