fix: correct spelling in error messages and documentation

[sfc-gh-twhite]

This PR corrects various spelling errors found throughout the codebase in error messages, documentation, and configuration files.

Changes Made

Error Messages & Documentation: Fixed spelling errors in multiple Rust files:

• extension.rs: Fixed "accomodate" → "accommodate" in context limit error message
• router_tools.rs: Fixed "Imporant" → "Important" in tool selection instructions
• system_gpt_4.1.md: Fixed "CRITIAL" → "CRITICAL" in system prompt documentation
• oauth.rs: Fixed "recieve" → "receive" in OAuth flow comment
• main.rs (mcp-server): Fixed "agrument" → "argument" in example prompt description

Configuration Files:

• kubernetes_swagger.json: Fixed "classses" → "classes" in DeviceClassSpec descriptions (2 instances)

[sfc-gh-twhite]

I used https://github.com/codespell-project/codespell to do these checks. I didn't modify a few that were provider-specific or valid code shorthands.

I would be happy to help integrate something like this into CI if that would be helpful or desired. 😄