Add CodeQL scanning for Python and JS/TS

[aaronmondal]

This scans the Python and javascript/typescript files in the repository. At the moment this is mostly a no-op but it provides a decent foundation for future changes around documentation.

Description

Please include a summary of the changes and the related issue. Please also
include relevant motivation and context.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please also list any relevant details for your test configuration

Checklist

• Updated documentation if needed
• Tests added/amended
• bazel test //... passes locally
• PR is contained in a single commit, using git amend see some docs