Improve MCP documentaion

[jirispilka]

• Get rid of legacy SSE
• Improve structure
  • quick start
  • configuration
  • examples

Sync with @TC-MO

[TC-MO]

I think I could take over structure work as this was something that I already wanted to work on in various pages. With some helps from AI team regarding examples I think we could collaborate on this issue.

[jirispilka]

FYI @MQ37