Initial marketplace: n8n-skills + doc-converter plugins

Marketplace with 2 plugins:
- n8n-skills v1.0.0 (7 skills for n8n workflow automation)
- doc-converter v1.0.0 (DOCX/PDF to HTML via Gemini Vision)

n8n-skills/README.md

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+# n8n Skills Plugin for Claude Code
+
+Complete set of n8n workflow automation skills for Claude Code, designed to work with the [n8n-mcp](https://github.com/nicosommi/n8n-mcp) MCP server.
+
+## Skills Included
+
+| Skill | Invocation | Description |
+|-------|-----------|-------------|
+| **Code JavaScript** | `/n8n-skills:code-javascript` | Write JavaScript in n8n Code nodes (`$input`, `$json`, `$helpers`) |
+| **Code Python** | `/n8n-skills:code-python` | Write Python in n8n Code nodes (`_input`, `_json`, standard library) |
+| **Expression Syntax** | `/n8n-skills:expression-syntax` | n8n `{{ }}` expression syntax, `$json/$node` variables |
+| **Workflow Patterns** | `/n8n-skills:workflow-patterns` | Webhook, API, database, AI agent, scheduled task patterns |
+| **Validation Expert** | `/n8n-skills:validation-expert` | Interpret/fix validation errors, profiles, auto-sanitization |
+| **Node Configuration** | `/n8n-skills:node-configuration` | Operation-aware config, property dependencies, `get_node` levels |
+| **MCP Tools Expert** | `/n8n-skills:mcp-tools-expert` | n8n-mcp tool selection, parameter formats, workflow management |
+
+## Requirements
+
+- [Claude Code](https://claude.ai/code) CLI
+- [n8n-mcp](https://github.com/nicosommi/n8n-mcp) MCP server (recommended)
+
+## Installation
+
+```bash
+# Via marketplace (if published)
+/plugin install n8n-skills
+
+# Or from local path
+/plugin install /path/to/n8n-skills
+```
+
+## Usage
+
+Skills are automatically triggered based on context, or invoke manually:
+
+```
+/n8n-skills:code-javascript
+/n8n-skills:workflow-patterns
+```