Add security scans to CI pipeline

[MuriloDalRi]

Add security scans.

https://trello.com/c/cngUG1UA/3572-add-security-scans-to-repos-that-currently-lack-them-3

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.

[sengi]

The commit title provides zero information about the change (because Git already knows which files are involved). If we allow generic commit titles like this, the usefulness of the commit history degrades over time. Could you please change it to, say, "Add security scans" like you've written in the description?

Same for the other PRs.

[sengi]

Thanks!