Create SECURITY.md

SECURITY.md

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+# Security Policy
+
+## Supported Versions
+
+The following table lists which versions of this project are currently supported with security updates.
+| Version   | Supported          |
+| --------- | ------------------ |
+| 2.3.1    | :white_check_mark: |
+| 2.2.0    | :white_check_mark: |
+| 2.1.0    | :x:                |
+| < 2.1.0  | :x:                |
+
+## Reporting a Vulnerability
+
+If you discover a security vulnerability in this project, please report it by emailing **security@example.com** with the subject line "Security Vulnerability Report".
+
+Please include as much detail as possible, including:
+- A description of the vulnerability
+- Steps to reproduce
+- Potential impact
+
+We will acknowledge receipt of your report within **2 business days**. You can expect a status update within **7 business days**. We will keep you informed of our progress and may request additional information if needed.
+
+If the vulnerability is confirmed, we will work to resolve it as quickly as possible and will notify you when a fix is available. If the report is declined, we will provide a clear explanation.