Add mcp-k8s-go server

[strowk]

Description

Added mcp-k8s-go server.

Server Details

• New Server: mcp-k8s-go

Motivation and Context

This is just a new server in group of community servers. It works with Kubernetes core API's using Golang client, and based on extensible underlying framework to help create (and generate) more servers in future from same/similar codebase.

How Has This Been Tested?

1. I have asked Claude Desktop to find some errors in my local k3d server.
   https://github.com/strowk/mcp-k8s-go/?tab=readme-ov-file#demo-usage-with-claude-desktop
2. I have built a functional testing harness that sends JSONRPC2 reqs and checks responses, f.e see:
   list_k8s_events_test
   These are run on CI per commit
3. I typically test new stuff using Inspector

Types of changes

• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

There is already another Typescript based community Kubernetes server, however I believe that Golang-based one would be easier to scale as it grows.