CodeGuard Rule Checker as CLI

[neilck]

I created a CLI that checks existing files against CodeGuard rules by calling LLM directly with source files.

Built for my own purpose as a startup developer, as adding all the rules into Agent context, and possibly having that run on every code change would eat up all my tokens. So instead, I run the CLI when I'm getting ready to commit the code.

https://github.com/neilck/codeguard-cli/releases/tag/v1.0.0

Because it optionally outputs JSON, might be useful for testing harness.