feat(security): enhance security features and logging in Dio

[Sylvester-git]

• Add CertificatePinner for fingerprint-based certificate pinning.
• Implement maxResponseSize to prevent memory exhaustion from large responses.
• Warn developers about missing timeouts in requests.
• Improve LogInterceptor to redact sensitive headers in logs.
• Update SECURITY.md with secure usage guidelines.

New Pull Request Checklist

• I have read the Documentation
• I have searched for a similar pull request in the project and found none
• I have updated this branch with the latest main branch to avoid conflicts (via merge from master or rebase)
• I have added the required tests to prove the fix/feature I'm adding
• I have updated the documentation (if necessary)
• I have run the tests without failures
• I have updated the CHANGELOG.md in the corresponding package

Additional context and info (if any)

[AlexV525]

Thanks for the purposal. But first, what is the motivation of these changes?

I've also have a couple of questions:

1. What cannot be done with the current dio?
2. The new SECURITY.md seems not only covering security concerns, and doesn't look like a standard security guide for the repo.
3. Why the request touches .gitignore?

We generally prefer precise, motivated, well-cared requests. Please reconsider if this is good to go. :)