MCP support

[jingkaihe]

Evaluating implementing MCP client capability so that 3rd party MCP servers/tools can be integrated with opsmate.

[jingkaihe]

Here is a prototype of k8s mcp server via shelling out to kubectl directly - https://gist.github.com/jingkaihe/96c3dd963785578f9716c74d33675cfc

[jingkaihe]

#182