Allow reuse of get_absolute_path, is_none_or_empty methods

- Move them to utils.helper.py for reuse
- Import those modules where required
- Delete duplicate methods defined in org_to_jsonl.py, asymmetric.py

utils/helpers.py

@@ -0,0 +1,9 @@
+import pathlib
+
+
+def is_none_or_empty(item):
+    return item == None or (hasattr(item, '__iter__') and len(item) == 0)
+
+
+def get_absolute_path(filepath):
+    return str(pathlib.Path(filepath).expanduser().absolute())