Update precheck to only run on qmd + bib files

.pre-commit-config.yaml

@@ -0,0 +1,21 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace  # Removes extra spaces
+        files: &files ^contents/.*\.(qmd|bib)$  # Restrict to .qmd and .bib files in contents/
+
+      - id: end-of-file-fixer    # Ensures a newline at EOF
+        files: *files
+        
+      - id: check-yaml           # Checks YAML syntax
+        files: *files
+
+  - repo: local
+    hooks:
+      - id: test-custom-script
+        name: Run test script
+        entry: scripts/test-script.sh
+        language: system
+        types: [file]
+        files: *files  # Reusing the same directory constraint