feat: add comprehensive MCP servers HTTP protocol collection and documentation

[Copilot]

This PR adds a comprehensive collection and documentation of MCP (Model Context Protocol) servers that support HTTP protocol communication, making them suitable for integration with the Askman Chrome Extension.

What's Added

📚 Complete Documentation Suite

• docs/mcp-servers.md - Detailed catalog of 10+ HTTP-compatible MCP servers including:

  • Official Anthropic servers: SQLite, Filesystem, Git, PostgreSQL, GitHub, Google Drive, Slack
  • Community servers: Web Search, REST API, Weather services
  • Each server documented with capabilities, authentication methods, repositories, and use cases

• docs/README.md - Comprehensive integration guide covering:

  • Security requirements (CORS, HTTPS, token authentication) for Chrome extensions
  • Performance considerations and best practices
  • Configuration examples and deployment instructions
  • Step-by-step getting started guide

• docs/examples.md - Practical implementation examples featuring:

  • TypeScript integration code with error handling
  • Enhanced PageChatService with MCP capabilities
  • Configuration management and testing patterns
  • Chrome extension-specific considerations

⚙️ Configuration System

• src/assets/conf/mcp-servers.toml - Ready-to-use TOML configuration templates for all documented servers with:

  • Complete server definitions with endpoints and authentication
  • Environment-specific settings and security configurations
  • Capability declarations and service-specific options

• Updated src/assets/conf/external-links.toml - Added MCP specification and resource links

🔗 Enhanced Project Integration

• Updated main README.md with dedicated MCP Server Integration section highlighting:
  • HTTP protocol support for Chrome extension compatibility
  • Secure token-based authentication
  • Extensive server catalog with 10+ documented options
  • Easy TOML-based configuration system

Key Features

Chrome Extension Focused: All servers verified for browser compatibility with proper CORS, HTTPS, and security requirements documented.

HTTP Protocol Emphasis: Specifically collected servers that support HTTP transport, making them accessible from web-based Chrome extension environments.

Security First: Comprehensive documentation of authentication patterns, content security policies, and secure integration practices.

Developer Ready: Includes practical TypeScript examples, error handling patterns, testing approaches, and configuration management.

Extensible Architecture: Provides a framework for easily adding new MCP servers in the future.

Example Usage

// Configure GitHub MCP server
const githubClient = new MCPClient({
  name: "GitHub Integration",
  endpoint: "https://mcp-github.example.com",
  authentication: "bearer",
  api_key: "ghp_your_token",
  capabilities: ["repositories", "files"],
  enabled: true
});

// Analyze repository structure
const repoInfo = await githubClient.call('get_repository_structure', {
  owner: 'askman-dev',
  repo: 'askman-chrome-extension'
});

This implementation provides developers with everything needed to integrate external data sources and tools via HTTP-compatible MCP servers into the Askman Chrome extension, enabling enhanced AI capabilities through secure, standardized server connections.

Fixes #229.

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