Adds a pre-commit hook to sanitize SVGs

Introduces a new pre-commit hook that removes control characters from SVG files.
This ensures that SVG files are clean and don't contain potentially malicious or problematic characters.

.pre-commit-config.yaml

@@ -184,6 +184,12 @@ repos:
         files: ^quarto/contents/.*\.qmd$
         description: "Ensure all referenced images exist on disk"
 
+      - id: sanitize-svgs
+        name: "Remove control chars from SVGs"
+        entry: bash -c 'perl -pi -e '\''s/[\x00-\x08\x0B\x0C\x0E-\x1F]//g'\'' "$@"' --
+        language: system
+        files: \.svg$
+
   # =============================================================================
   # PHASE 5: SYSTEM & WORKFLOW CHECKS (Final validation)
   # =============================================================================