Integrate secrets-scanner checks

[abose]

• Detect any secrets like AWS keys, passwords/email ids Etc.
• CLI and config file support.
• Secrets scanner should be purely nodejs and not require python/other deps in this template.
• Gitignore should be honored when checking files to scan for secrets. Can use this lib: https://www.npmjs.com/package/gitignore-parser
• Builds should fail on commit & push if any secrets are detected.
• Secrets scan should be a part of pull request validation step to.

[Ushmajit]

Useful link: https://spectralops.io/blog/top-9-git-secret-scanning-tools/