feat: add Social Media profession — 5 new skills, pm-social bundle, v13.0.0

New profession: Social Media (Skills 151–155)

Skills added:
- social-media-audit: Scored platform audit with competitive benchmarking and prioritised action plan
- influencer-brief: Complete creator partnership brief with deliverables, approval workflow, and commercial terms
- community-management-playbook: Response frameworks, moderation rules, escalation tiers, and DM templates
- social-ad-campaign: Full-funnel paid social plan with ad copy for every format and A/B testing plan
- viral-content-framework: 6 hook formulas, 5 content structures, platform playbooks, and content testing system

Changes:
- Added plugins/pm-social/ bundle with all 5 skills
- Updated .claude-plugin/marketplace.json to v13.0.0 (155 skills, 17 professions, 24 bundles)
- Updated README.md: title, badges, description, What's New section, All Skills table, plugin bundle list

https://claude.ai/code/session_01E4bTUWxx4Zo5rsFpad5X5B

.claude-plugin/marketplace.json

@@ -1,8 +1,8 @@
 {
   "$schema": "https://anthropic.com/claude-code/marketplace.schema.json",
   "name": "pm-claude-skills",
-  "version": "12.0.0",
-  "description": "PM stands for Professional, not just Product Management. 150 Claude Skills + 4 agent templates across 23 bundles covering 16 professions — engineering, customer success, legal, finance, HR, sales, design, Figma, marketing, and more. Built by a PM, used by everyone. Building blocks for the Anthropic agent template architecture.",
+  "version": "13.0.0",
+  "description": "PM stands for Professional, not just Product Management. 155 Claude Skills + 4 agent templates across 24 bundles covering 17 professions — engineering, customer success, legal, finance, HR, sales, design, Figma, marketing, social media, and more. Built by a PM, used by everyone. Building blocks for the Anthropic agent template architecture.",
   "owner": {
     "name": "Mohit Aggarwal",
     "email": "mohit15856@gmail.com"
@@ -191,6 +191,14 @@
       "category": "productivity",
       "source": "./plugins/pm-figma",
       "homepage": "https://github.com/mohitagw15856/pm-claude-skills"
+    },
+    {
+      "name": "pm-social",
+      "description": "Social Media skills: Social Media Audit, Influencer Brief, Community Management Playbook, Social Ad Campaign, Viral Content Framework. Score your social presence, brief influencer partnerships, manage communities at scale, plan paid social campaigns with full ad copy, and build a repeatable system for shareable content.",
+      "version": "1.0.0",
+      "category": "productivity",
+      "source": "./plugins/pm-social",
+      "homepage": "https://github.com/mohitagw15856/pm-claude-skills"
     }
   ]
 }