Add SECURITY

Author: MasterJ93

SECURITY.md

@@ -0,0 +1,20 @@
+# Security Policy
+
+## Version Support
+Currently, the latest version of `ATSyntaxTools` supports security vulnerability reports.
+
+## Reporting a Vulnerability
+
+Please don’t report possible security vulnerabilities in public forums, channels, or services. This includes the Issues section on GitHub, Discord, or some other service. Instead, please go to Security > Advisories and click on [New Draft Security Advisory](https://github.com/ATProtoKit/ATSyntaxTools/security/advisories/new). Alternatively, you can email me at [security@cjrriley.com](mailto:security@cjrriley.com?subject=ATSyntaxTools%20Security%20Vulnerability:%20[ENTER%20TITLE%20HERE])
+ with the subject line `ATSyntaxTools Security Issue: [title of vulnerability]`. Please type out what you found, how to reproduce the steps, a possible link to a sample project that can reproduce the error, and any other additional information that could help me fix the problem.
+
+I will get back to you within three business days, along with a follow-up when I fix the vulnerabilities. Once I fixed it, you’re free to discuss it.
+
+If you’d like for me to add you to the CONTRIBUTORS file, please give me the following details:
+- Your name; whether it’s:
+    - First and last name (optional)
+    - Your username on some Git service (GitHub, GitLab, Bitbucket) (optional)
+    - An alias (required if you don’t want to use the above options)
+- Email address (optional)
+- Social media (up to three; Bluesky link encouraged!)
+- Website (optional)