docs: comprehensive documentation update for production deployment

- Updated README.md with clear setup instructions and recent updates
- Simplified Claude Desktop setup guide with troubleshooting
- Enhanced HTTP deployment guide for production use
- Streamlined troubleshooting guide with quick fixes
- Added mcp-http-client.js for Node.js 16 compatibility
- Fixed stdio mode console output corruption

Key improvements:
- Clear distinction between local and remote deployment
- Node.js 18+ requirement for mcp-remote clearly documented
- USE_FIXED_HTTP=true prominently featured for v2.3.2
- Production deployment best practices
- Multi-user service considerations

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/mcp/index.ts

@@ -20,9 +20,12 @@ async function main() {
   try {
     const mode = process.env.MCP_MODE || 'stdio';
     
-    console.error(`Starting n8n Documentation MCP Server in ${mode} mode...`);
-    console.error('Current directory:', process.cwd());
-    console.error('Node version:', process.version);
+    // Only show debug messages in HTTP mode to avoid corrupting stdio communication
+    if (mode === 'http') {
+      console.error(`Starting n8n Documentation MCP Server in ${mode} mode...`);
+      console.error('Current directory:', process.cwd());
+      console.error('Node version:', process.version);
+    }
     
     if (mode === 'http') {
       // Check if we should use the fixed implementation