Add Production Grade skill — 14-agent orchestrator pipeline

Add nagisanzenin/claude-code-production-grade-plugin to Community
Contributors in README.md. This is a 14-agent autonomous pipeline
for full-project delivery with two-wave parallel execution.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -503,6 +503,7 @@ This collection would not be possible without the incredible work of the Claude
 - **[MojoAuth/skills](https://github.com/MojoAuth/skills)**: Production-ready MojoAuth guides and examples for popular frameworks like Node.js, Next.js, React, Java, .NET Core, Go, iOS, and Android.
 - **[Xquik-dev/x-twitter-scraper](https://github.com/Xquik-dev/x-twitter-scraper)**: X (Twitter) data platform — tweet search, user lookup, follower extraction, engagement metrics, giveaway draws, monitoring, webhooks, 19 extraction tools, MCP server.
 - **[shmlkv/dna-claude-analysis](https://github.com/shmlkv/dna-claude-analysis)**: Personal genome analysis toolkit — Python scripts analyzing raw DNA data across 17 categories (health risks, ancestry, pharmacogenomics, nutrition, psychology, etc.) with terminal-style single-page HTML visualization.
+- **[nagisanzenin/claude-code-production-grade-plugin](https://github.com/nagisanzenin/claude-code-production-grade-plugin)**: Production Grade — 14-agent autonomous pipeline for full-project delivery. Requirements, architecture, backend, frontend, testing, security, code review, infrastructure, SRE, documentation. Two-wave parallel execution (MIT).
 
 ### Inspirations