[Feature Request] Add autoStart configuration option for lazy-loading MCP servers

Question

**Bug Description**
  ---Feature Request: Lazy-load MCP servers on-demand

Currently, all MCP servers auto-start when Claude Code launches.

Requested: Add autoStart: false option so specific servers only load when explicitly requested (via /mcp or first tool
  use).

Use case: Linear MCP only needed occasionally but loads every session.

Example config:
  {
    "linear": {
      "type": "http",
      "url": "https://mcp.linear.app/mcp",
      "autoStart": false
    }
  }
  ---

**Enviro