Set up CodeQL

[ChaelCodes]

Description

Let's add CodeQL so we can get some security scanning set up by default. I'm fine with the defaults, but I would like to use the codeql GitHub action, and have the config committed if possible.

Resources

https://docs.github.com/en/code-security/code-scanning/introduction-to-code-scanning/about-code-scanning-with-codeql
https://github.com/github/codeql-action/