Fixed load vtl to create path from string.

src/vtlengine/API/_InternalApi.py

@@ -197,7 +197,11 @@ def load_vtl(input: Union[str, Path]):
     the file.
     """
     if isinstance(input, str):
-        return input
+        try:
+            test = Path(input)
+        except Exception:
+            return input
+        input = test
     if not isinstance(input, Path):
         raise Exception('Invalid vtl file. Input is not a Path object')
     if not input.exists():

src/vtlengine/API/__init__.py

@@ -144,7 +144,7 @@ def run(script: Union[str, Path], data_structures: Union[dict, Path, List[Union[
 
     The data structure information is contained in the JSON file given,
     and establish the datatype (string, integer or number),
-    and the role that each component is going to have (Identifier or Measure).
+    and the role that each component is going to have (Identifier, Attribute or Measure).
     It can be a dictionary or a path to the JSON file or folder that contains it.
 
     Moreover, a csv file with the data to operate with is going to be loaded.