Add support security report

[hypnguyen1209]

Removed the supported versions section from the security policy.

Description

Related Issues

Change Type

• Bug fix
• New feature
• Performance improvement
• Refactor
• Documentation
• Test
• Build or CI

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Reviewer Notes

[Copilot]

Pull request overview

This PR introduces a repository-level SECURITY.md intended to describe how to report security vulnerabilities (with the “Supported Versions” section omitted, per the PR description).

Changes:

• Added a new SECURITY.md file with a Security Policy heading and a “Reporting a Vulnerability” section.

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