Allow reload of MCP servers during session

[akashanand98]

Checks

• I have searched github.com/aws/amazon-q-developer-cli/issues and there are no duplicates of my issue

Operating system

macOS 15.4.1 (24E263)

Expected behaviour

Q CLI Session should handle hot reload using asomething like /tools reload which allows mcp configurations to be reloaded.

Actual behaviour

It requires user to restart the session to enable the mcp configurations reloaded.

Steps to reproduce

No response