ci: add CodeQL scanning

[ryzrr]

Summary
Adds a CodeQL security-scanning

What kind of change does this PR introduce?
CI/tooling

Did you add tests for your changes?
No

Does this PR introduce a breaking change?
No

If relevant, what needs to be documented once your changes are merged or what have you already documented?
NA

Use of AI
No

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Project	Deployment	Actions	Updated (UTC)
webpack-doc-kit	Ready	Preview, Comment	Jun 22, 2026 2:47pm

[github-advanced-security]

You are seeing this message because GitHub Code Scanning has recently been set up for this repository, or this pull request contains the workflow file for the Code Scanning tool.

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• Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results.
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For more information about GitHub Code Scanning, check out the documentation.