chore: enable codeql and workflows cleanup

[0xmad]

Description

Add CodeQL boilerplate config and remove master branch from workflow files

Additional Notes

N/A

Related issue(s)

Related to #793

Confirmation

• I have read and understand MACI's contributor guidelines and code of conduct.
• I have read and understand MACI's GitHub processes.
• I have read and understand MACI's testing guide.

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[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.

[ctrlc03]

Thanks, just one question

[samajammin]

Nice! 🎉

[samajammin]

So @0xmad does this workflow perform the same thing as the default setup? https://docs.github.com/en/code-security/code-scanning/enabling-code-scanning/configuring-default-setup-for-code-scanning

[0xmad]

So @0xmad does this workflow perform the same thing as the default setup? https://docs.github.com/en/code-security/code-scanning/enabling-code-scanning/configuring-default-setup-for-code-scanning

Yes, this one is a default config but with tweaks for our project.