Add Rust to CodeQL security analysis

Enable Rust language scanning in CodeQL workflow to catch
security issues in Rust dependencies.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

Author: hyperpolymath

.github/workflows/codeql.yml

@@ -32,6 +32,8 @@ jobs:
         include:
           - language: javascript-typescript
             build-mode: none
+          - language: rust
+            build-mode: none
 
     steps:
       - name: Checkout