feat: add security policy

Fixes #31

SECURITY.md

@@ -0,0 +1,12 @@
+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| latest  | :white_check_mark: |
+
+## Reporting a Vulnerability
+
+Use [GitHub Private Security Reporting](https://github.com/Erb3/Sveio/security/advisories/new) to report any vulnerability.
+Do not disclose a vulnerability to anyone else, and **DO NOT** add it to the public issue tracker!

frontend/.well-known/security.txt

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+Contact: https://github.com/Erb3/Sveio/security/advisories/new
+Expires: 2030-01-01T00:00:00.000Z
+Acknowledgments: https://github.com/Erb3/Sveio/security/advisories/
+Preferred-Languages: en
+Policy: https://github.com/Erb3/Sveio/blob/main/SECURITY.md