Complete core ES module migration with build system and tests

- Enhanced build system to generate ESM, UMD, and minified formats
- Fixed test extraction script to properly parse OxJS inline tests
- Added comprehensive test infrastructure with Vitest
- Successfully extracted 22 test files from inline documentation
- Verified builds work in browser and Node.js environments
- Maintained full backward compatibility with Ox.load() pattern
- Updated .gitignore to exclude build artifacts (dev/, min/, dist/, test/extracted/)

Generated with AI assistance

scripts/extract-tests.js

@@ -47,10 +47,26 @@ function parseDocComments(source, filename) {
  */
 function parseDocContent(content, filename) {
     const lines = content.split('\n');
-    const firstLine = lines[0].trim();
-    const itemMatch = firstLine.match(re.item);
     
-    if (!itemMatch) return null;
+    // Find the first non-empty line that matches the item pattern
+    let itemMatch = null;
+    let itemName = 'Unknown';
+    
+    for (const line of lines) {
+        const trimmed = line.trim();
+        if (trimmed) {
+            itemMatch = trimmed.match(re.item);
+            if (itemMatch) {
+                break;
+            }
+        }
+    }
+    
+    if (!itemMatch) {
+        // If no item match, still try to extract tests with a generic name
+        // This handles cases where tests are in script blocks or without proper headers
+        itemMatch = ['', filename.replace(/.*\//, '').replace('.js', ''), 'tests', ''];
+    }
 
     const doc = {
         name: itemMatch[1],