feat: add windows-mcp marketplace example configuration

- Created marketplace-examples directory for MCP server submissions
- Added windows-mcp.yaml with complete configuration following marketplace schema
- Included multiple installation methods (uvx, pip, development)
- Added comprehensive documentation explaining marketplace submission process
- Addresses #7613 by providing reference configuration for windows-mcp

This example can be used by maintainers to add windows-mcp to the marketplace backend API.

Author: roomote

marketplace-examples/README.md

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+# Marketplace Examples
+
+This directory contains example configurations for items that could be added to the Roo Code Marketplace.
+
+## Purpose
+
+Since the Roo Code Marketplace items are managed through an external API (`https://api.roocode.com/api/marketplace/`), this directory serves as:
+
+1. **Reference examples** for new marketplace submissions
+2. **Documentation** of the expected format for MCP servers and modes
+3. **Testing ground** for validating configurations before they're added to the marketplace backend
+
+## Structure
+
+```
+marketplace-examples/
+├── mcp-servers/        # Example MCP server configurations
+│   └── windows-mcp.yaml
+└── modes/             # Example custom mode configurations (future)
+```
+
+## MCP Server Configuration Format
+
+MCP server configurations follow the schema defined in `packages/types/src/marketplace.ts`. Each configuration should include:
+
+### Required Fields
+
+- `id`: Unique identifier for the MCP server
+- `name`: Display name
+- `description`: Clear description of what the server does
+- `url`: GitHub repository or project URL
+- `content`: Installation configuration(s)
+
+### Optional Fields
+
+- `author`: Creator's name
+- `authorUrl`: Link to author's profile
+- `tags`: Array of relevant tags for discovery
+- `prerequisites`: System requirements or dependencies
+- `parameters`: Configurable options for the server
+
+## Example: Windows MCP
+
+The `mcp-servers/windows-mcp.yaml` file demonstrates a complete configuration for the Windows MCP server, which allows AI agents to control Windows desktop applications, browsers, and file operations.
+
+### Key Features Highlighted:
+
+- Multiple installation methods (uvx, pip, development)
+- Clear prerequisites for each installation method
+- Optional configuration parameters
+- Comprehensive tagging for discoverability
+
+## How to Submit to Marketplace
+
+Currently, marketplace items are managed through the Roo Code backend API. To submit a new MCP server:
+
+1. Create a configuration file following the examples in this directory
+2. Test the configuration locally to ensure it works
+3. Submit an issue using the [Marketplace Feedback template](https://github.com/RooCodeInc/Roo-Code/issues/new?template=marketplace.yml)
+4. Include your configuration file in the issue
+5. The Roo Code team will review and add it to the marketplace backend
+
+## Testing Locally
+
+While these configurations cannot be directly used in the extension (as it fetches from the API), you can manually test MCP servers by:
+
+1. Installing them according to their documentation
+2. Adding them to your `.roo/mcp.json` (project-level) or global MCP settings
+3. Verifying they work correctly with Roo Code
+
+## Contributing
+
+If you'd like to add more example configurations:
+
+1. Follow the existing format and structure
+2. Ensure all required fields are present
+3. Test the installation instructions
+4. Submit a PR with your example configuration
+
+## Notes
+
+- These examples are for reference only and don't automatically appear in the marketplace
+- The actual marketplace data is served from `https://api.roocode.com/api/marketplace/mcps`
+- Changes to the marketplace require backend updates by the Roo Code team

marketplace-examples/mcp-servers/windows-mcp.yaml

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+# Windows MCP Server Configuration
+# This is a sample configuration for adding windows-mcp to the MCP Marketplace
+# Repository: https://github.com/CursorTouch/Windows-MCP
+
+id: windows-mcp
+name: Windows MCP
+description: Control Windows PC with an AI agent - automate desktop apps, web browsers, file operations, and more. Perfect for testing applications, automating workflows, and controlling VS Code itself.
+author: CursorTouch
+authorUrl: https://github.com/CursorTouch
+url: https://github.com/CursorTouch/Windows-MCP
+tags:
+  - automation
+  - windows
+  - desktop-control
+  - testing
+  - browser-automation
+  - file-management
+prerequisites:
+  - Windows operating system
+  - Python 3.8 or higher
+  - pip package manager
+
+# Installation methods for different scenarios
+content:
+  - name: Standard Installation
+    content: |
+      {
+        "command": "uvx",
+        "args": ["--from", "windows-mcp", "windows-mcp"],
+        "env": {}
+      }
+    prerequisites:
+      - uvx installed (pip install uvx)
+    
+  - name: Python Package Installation
+    content: |
+      {
+        "command": "python",
+        "args": ["-m", "windows_mcp"],
+        "env": {}
+      }
+    prerequisites:
+      - pip install windows-mcp
+    
+  - name: Development Installation
+    content: |
+      {
+        "command": "python",
+        "args": ["path/to/windows-mcp/main.py"],
+        "env": {
+          "PYTHONPATH": "path/to/windows-mcp"
+        }
+      }
+    prerequisites:
+      - Clone repository: git clone https://github.com/CursorTouch/Windows-MCP.git
+      - Install dependencies: pip install -r requirements.txt
+
+# Optional parameters for configuration
+parameters:
+  - name: Screenshot Directory
+    key: screenshot_dir
+    placeholder: "C:\\Screenshots"
+    optional: true
+  
+  - name: Automation Speed
+    key: automation_speed
+    placeholder: "normal"
+    optional: true
+  
+  - name: Enable Logging
+    key: enable_logging
+    placeholder: "false"
+    optional: true