Add security policy and reporting guidelines (#5456)

Signed-off-by: Fabian Ruffy <[email protected]>

Author: fruffy

SECURITY.md

@@ -0,0 +1,21 @@
+# Security Policy
+
+## Reporting a Vulnerability
+If you believe you have found a security vulnerability in any repository owned by the P4 organization, please report it to us through coordinated disclosure.
+
+Please do not report security vulnerabilities through public GitHub issues, discussions, or pull requests.
+
+Instead, please send an email to info[@]p4.org.
+
+Please include as much of the information listed below as you can to help us better understand and resolve the issue:
+
+- The type of issue (e.g., buffer overflow, SQL injection, or cross-site scripting)
+- Full paths of source file(s) related to the manifestation of the issue
+- The location of the affected source code (tag/branch/commit or direct URL)
+- Any special configuration required to reproduce the issue
+- Step-by-step instructions to reproduce the issue
+- Proof-of-concept or exploit code (if possible)
+- Impact of the issue, including how an attacker might exploit the issue
+
+This information will help us triage your report more quickly.
+