feat(translator): add filesystem module to standard library imports

- Include 'std/fs.h' in the list of standard library headers
- Enable filesystem operations support in the translator
- Add file system utility functions access for users

src/Translator.php

@@ -2618,6 +2618,7 @@ CODE;
                 'std/math.h',
                 'std/json.h',
                 'std/datetime.h',
+                'std/fs.h',
                 'std/hash.h',
                 'std/misc.h',
                 'std/random.h',