build: add -ldl linker flag, recursive source discovery, and API test targets to Makefile

tests/js/script.js

@@ -0,0 +1,9 @@
+// JavaScript for enhanced security and interactivity
+
+// Example: Prevent form submission for demonstration
+document.querySelectorAll('form').forEach(form => {
+  form.addEventListener('submit', function(event) {
+    event.preventDefault();
+    alert('Form submission is disabled for security reasons.');
+  });
+});