chore: add GitHub workflow files from zitadel-node

[mridang]

Description

Added GitHub workflow files from the zitadel-node repository to standardize CI/CD processes across all ZITADEL authentication examples.

Related Issue

N/A

Motivation and Context

To maintain consistency across all ZITADEL example repositories, we're syncing the standard GitHub Actions workflows from the zitadel-node repository. This ensures all examples follow the same quality standards for linting, testing, type checking, dependency management, and security scanning.

How Has This Been Tested?

Workflows will be tested automatically upon merge through GitHub Actions triggers.

Documentation:

No documentation changes required - these are internal CI/CD configurations.

Checklist:

• I have updated the documentation accordingly.
• I have assigned the correct milestone or created one if non-existent.
• I have correctly labeled this pull request.
• I have linked the corresponding issue in this description.
• I have requested a review from at least 2 reviewers
• I have checked the base branch of this pull request
• I have checked my code for any possible security vulnerabilities