Add Snyk: New vulnerabilities check

Author: continue[bot]

.continue/checks/snyk-new-vulnerabilities.md

@@ -0,0 +1,46 @@
+---
+name: "Snyk: New vulnerabilities"
+rules: continuedev/gh-pr-commit-workflow
+---
+
+A new Snyk vulnerability has been detected. Please investigate and resolve the issue. This should include the following steps:
+
+**Step 1: Investigate the Issue**
+Make sure you understand the vulnerability, the options for resolution, and what their consequences are.
+
+**Step 2: Implement Fix**
+- Focus on fixing the immediate issue identified
+- Avoid overdoing it with error handling, cleaning up other problems, etc.
+- Avoid making breaking changes
+- Ensure the solution is robust and follows best practices.
+
+**Step 3: Create Draft Pull Request**
+Create a draft pull request with the following structure:
+
+---
+**PR Title:** [Snyk] <brief description of issue solved>
+
+## Issue
+
+**Snyk Link:** [<shortId>](<permalink>)
+**Issue Type:** `<issue type>`
+**Priority:** <priority>
+**Summary:** <Two sentence summary of what caused the issue and how it was fixed>
+
+## Additional Context
+
+<details>
+<summary>Snyk Issue Details</summary>
+
+```json
+<Complete issue details from webhook payload>
+```
+
+</details>
+
+---
+**Note for AI:** 
+- Replace `<agent-session-id>` with the actual agent session ID
+
+---
+Below is the webhook payload from the Snyk event: