Security auditor, personas, orchestration, docs catalog & roadmap (#35)

Closes the remaining gaps vs alirezarezvani/claude-skills across trust, content
types, discoverability, and community.

Security (trust signal + useful):
- scripts/skill-audit.mjs scans skills/*/SKILL.md + each skill's scripts/ for
  prompt injection, exfiltration, dynamic code exec, destructive shell, secrets,
  and hidden text. HIGH fails CI (.github/workflows/skill-audit.yml) + a badge.
- New skill-security-auditor skill teaches the same review (production tier).

Content types:
- output-styles/ — 4 personas (Startup CTO, Growth Marketer, Solo Founder,
  Product Leader) as Claude Code output styles; --agent claude installs them too.
- ORCHESTRATION.md — Skill Chain / Multi-Agent Handoff / Domain Deep-Dive /
  Solo Sprint patterns.

Discoverability:
- scripts/build-docs.mjs generates a server-rendered, SEO-indexable
  web/catalog.html of all skills (built in the Pages deploy; gitignored).
  Linked from README + playground.

Community:
- ROADMAP.md (now/next/later + good-first-issues).

README badges/sections, TIERS (47 production), CHANGELOG, package.json files,
and exports/web index all updated. SkillCheck + security audit + exports verified.


Claude-Session: https://claude.ai/code/session_016JWn5jRD5tcEFKrubjQ6Px

Co-authored-by: Claude <noreply@anthropic.com>

exports/cursor/README.md

@@ -3,7 +3,7 @@
 > Auto-generated from `skills/*/SKILL.md` by `scripts/build-exports.mjs`.
 > **Do not edit these files by hand** — edit the source skill and regenerate.
 
-172 skills exported. Copy a `.mdc rule` into the tool to use it.
+173 skills exported. Copy a `.mdc rule` into the tool to use it.
 
 | Skill | Bundle | Path |
 |---|---|---|
@@ -148,6 +148,7 @@
 | Security Threat Model | `pm-engineering` | `pm-engineering/security-threat-model/security-threat-model.mdc` |
 | SEO Content Brief | `pm-gtm` | `pm-gtm/seo-content-brief/seo-content-brief.mdc` |
 | Service Catalog Entry | `pm-engineering` | `pm-engineering/service-catalog-entry/service-catalog-entry.mdc` |
+| Skill Security Auditor | `other` | `other/skill-security-auditor/skill-security-auditor.mdc` |
 | SLO and Error Budget | `pm-engineering` | `pm-engineering/slo-error-budget/slo-error-budget.mdc` |
 | Social Ad Campaign | `pm-social` | `pm-social/social-ad-campaign/social-ad-campaign.mdc` |
 | Social Media Audit | `pm-social` | `pm-social/social-media-audit/social-media-audit.mdc` |