feat(bundles): add 5 Claude Code plugin bundles (Epic 3)

5 curated plugin bundles ready for submission to
anthropics/claude-plugins-official as external plugins.

Bundles:
- engineering-skills (8 flagship): fullstack, devops, security, docker,
  terraform, mcp-server-builder, rag-architect, code-reviewer
- compliance-skills (9 flagship): ISO 27001, SOC 2, GDPR, EU AI Act,
  NIS2, DORA, ISO 13485, MDR, FDA
- c-level-skills (7 flagship): CEO/CTO/CFO/CISO/CMO advisors plus
  board-meeting and board-deck-builder
- marketing-skills (6 flagship): content-creator, seo-audit, demand
  acquisition, campaign-analytics, landing-page-generator, x-twitter
- product-skills (6 flagship): product-manager-toolkit, strategist,
  agile-product-owner, product-designer, ux-researcher, design-system

Each bundle has .claude-plugin/plugin.json per Anthropic's external
plugin schema, a README, and symlinks into the canonical skill
directories. Symlinks keep a single source of truth for skill content;
scripts/export_bundle.py dereferences them for self-contained exports
when submitting PRs to the Anthropic registry.

Total: 44 KB repo addition, 36 symlinks.

Author: borghei

bundles/README.md

@@ -0,0 +1,17 @@
+{
+  "name": "c-level-skills",
+  "version": "1.0.0",
+  "description": "7 flagship C-suite advisory skills: CEO, CTO, CFO, CISO, CMO advisors plus board meeting and board deck building.",
+  "author": {
+    "name": "Brian Borghei",
+    "email": "borghei.mohammadamin@gmail.com"
+  },
+  "homepage": "https://github.com/borghei/Claude-Skills",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/borghei/Claude-Skills",
+    "directory": "bundles/c-level-skills"
+  },
+  "license": "MIT + Commons Clause",
+  "keywords": ["c-level", "ceo", "cto", "cfo", "ciso", "cmo", "board", "executive", "strategic"]
+}

bundles/c-level-skills/.claude-plugin/plugin.json

@@ -0,0 +1 @@
+../../../c-level-advisor/board-deck-builder

bundles/c-level-skills/README.md

@@ -0,0 +1 @@
+../../../c-level-advisor/board-meeting

bundles/c-level-skills/skills/board-deck-builder

@@ -0,0 +1 @@
+../../../c-level-advisor/ceo-advisor

bundles/c-level-skills/skills/board-meeting

@@ -0,0 +1 @@
+../../../c-level-advisor/cfo-advisor

bundles/c-level-skills/skills/ceo-advisor

@@ -0,0 +1 @@
+../../../c-level-advisor/ciso-advisor

bundles/c-level-skills/skills/cfo-advisor

@@ -0,0 +1 @@
+../../../c-level-advisor/cmo-advisor

bundles/c-level-skills/skills/ciso-advisor

@@ -0,0 +1 @@
+../../../c-level-advisor/cto-advisor