WIP: ai-assistant: Add MCP support

[illume]

Issue needs to be written.

• Why? What? How?
• Impact on who?
• Security threat modelling: implications and mitigations

[illume]

Bit of a status update.

The headlamp mcp PR

• WIP: app: Add MCP server support for ai-assistant kubernetes-sigs/headlamp#4135
• I broke it down into separate commits with docs+tests+fixes
• Still has a bunch of testing to do, it's likely buggy/not working
• It still needs to move some of these ipc methods so they are restricted to ai-assistant only (but first testing it still works should be done).

Plugin MCP PRs

I want to work through your MCP plugin PR, once the type fixes+headlamp-plugin upgrade+langchain upgrade are merged (because then we have better type checking and story books again).

• this first: ai-assistant: Type fixing, upgrading dependencies #452
• ai-assistant: Add ability to run mcp server from ai-assistant plugin #385