Add CLI skills pack

[dennis-chen-vanta]

Add several skills for use with the CLI:

Skill	What it does
control-testing-procedures	Writes Test of Design / Test of Operating Effectiveness procedures for controls
personnel-report	Prioritized digest + audit CSV of personnel tasks overdue or due within a horizon
suggest-mitigating-controls	Evaluates the control library against a risk scenario and recommends mitigating controls
suggest-risk-scenarios	Finds risk register coverage gaps and recommends tailored scenarios from a bundled taxonomy
test-remediation-digest	Turns failing tests into per-engineer fix instructions and handoff files
unassigned-controls-report	Finds ownerless controls and recommends an active owner from domain ownership patterns
weekly-vulnerability-triage	Tiers new and SLA-breaching vulnerabilities and drafts per-owner remediation outreach