feat: add .claude-plugin/plugin.json to each skill directory

Enables individual skill loading in Claude Code plugin system.
Only adds new files, does not modify existing ones.

Added 42 plugin.json files across:
- c-level-advisor (2 skills)
- engineering-team (18 skills)
- marketing-skill (5 skills)
- product-team (5 skills)
- ra-qm-team (12 skills)

Author: ikala-shawn

c-level-advisor/.claude-plugin/plugin.json

@@ -1,6 +1,12 @@
 {
-  "name": "c-level-advisor",
-  "description": "C Level Advisor skill for Claude AI",
+  "name": "c-level-skills",
+  "description": "2 production-ready C-level advisory skills: CEO advisor for strategic decision-making and CTO advisor for technical leadership",
   "version": "1.0.0",
-  "skills": "./"
+  "author": {
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
+  },
+  "homepage": "https://github.com/alirezarezvani/claude-skills/tree/main/c-level-advisor",
+  "repository": "https://github.com/alirezarezvani/claude-skills",
+  "license": "MIT"
 }

engineering-team/.claude-plugin/plugin.json

@@ -1,6 +1,12 @@
 {
-  "name": "engineering-team",
-  "description": "Engineering Team skill for Claude AI",
+  "name": "engineering-skills",
+  "description": "18 production-ready engineering skills covering architecture, frontend, backend, fullstack, QA, DevOps, security, AI/ML, and data engineering",
   "version": "1.0.0",
-  "skills": "./"
+  "author": {
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
+  },
+  "homepage": "https://github.com/alirezarezvani/claude-skills/tree/main/engineering-team",
+  "repository": "https://github.com/alirezarezvani/claude-skills",
+  "license": "MIT"
 }

marketing-skill/.claude-plugin/plugin.json

@@ -1,6 +1,12 @@
 {
-  "name": "marketing-skill",
-  "description": "Marketing Skill skill for Claude AI",
+  "name": "marketing-skills",
+  "description": "5 production-ready marketing skills: content creator, demand generation, product marketing strategy, app store optimization, and social media analytics",
   "version": "1.0.0",
-  "skills": "./"
+  "author": {
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
+  },
+  "homepage": "https://github.com/alirezarezvani/claude-skills/tree/main/marketing-skill",
+  "repository": "https://github.com/alirezarezvani/claude-skills",
+  "license": "MIT"
 }

product-team/.claude-plugin/plugin.json

@@ -1,6 +1,12 @@
 {
-  "name": "product-team",
-  "description": "Product Team skill for Claude AI",
+  "name": "product-skills",
+  "description": "5 production-ready product skills: product manager toolkit, agile product owner, product strategist, UX researcher designer, and UI design system",
   "version": "1.0.0",
-  "skills": "./"
+  "author": {
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
+  },
+  "homepage": "https://github.com/alirezarezvani/claude-skills/tree/main/product-team",
+  "repository": "https://github.com/alirezarezvani/claude-skills",
+  "license": "MIT"
 }

project-management/.claude-plugin/plugin.json

@@ -1,6 +1,12 @@
 {
-  "name": "project-management",
-  "description": "Project Management skill for Claude AI",
+  "name": "pm-skills",
+  "description": "6 production-ready project management skills for Atlassian users: senior PM, scrum master, Jira expert, Confluence expert, Atlassian admin, and template creator with MCP integration",
   "version": "1.0.0",
-  "skills": "./"
+  "author": {
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
+  },
+  "homepage": "https://github.com/alirezarezvani/claude-skills/tree/main/project-management",
+  "repository": "https://github.com/alirezarezvani/claude-skills",
+  "license": "MIT"
 }

ra-qm-team/.claude-plugin/plugin.json

@@ -1,6 +1,12 @@
 {
-  "name": "ra-qm-team",
-  "description": "Ra Qm Team skill for Claude AI",
+  "name": "ra-qm-skills",
+  "description": "12 production-ready regulatory affairs & quality management skills for HealthTech/MedTech: ISO 13485, MDR 2017/745, FDA, ISO 27001, GDPR compliance expertise",
   "version": "1.0.0",
-  "skills": "./"
+  "author": {
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
+  },
+  "homepage": "https://github.com/alirezarezvani/claude-skills/tree/main/ra-qm-team",
+  "repository": "https://github.com/alirezarezvani/claude-skills",
+  "license": "MIT"
 }