Support push_to_hub in marimo notebooks

[kazemihabib]

Is your feature request related to a problem? Please describe.
In marimo notebooks (https://marimo.io/) the push_to_hub function fails because get_source function
can not fetch the source.
Describe the solution you'd like
I have already written a patch https://github.com/kazemihabib/Huggingface-Agents-Course-Marimo-Edition/blob/marimo/patches/smolagents_patches.py that fixes this problem.

Is this not possible with the current options.
Current get_source function of smolagents, can fetch the source of function tools that are not prefixed by underscore but fails with classes.
The reason is the following:
1)If obj is a Class, inspect.getsource(obj) will raise an error
2) If obj is a function, inspect.getsource(obj) will return the source code
3) If obj is a Class, in marimo inspect.getfile(obj) will return the path of the file
4) If obj is a function, in marimo inspect.getfile(obj) will return a non-useful path
5) If obj is local to cell (_ prefixed) obj.__name__ will return _cell_{cell_id}{obj orig name} so if obj is a function, the smolagents to_dict function
(https://github.com/huggingface/smolagents/blob/main/src/smolagents/tools.py#L243)
attempts to replace the function name with forward in the source code, but fails because it can't
find the prefixed name pattern. As a result, the uploaded tool lacks a forward function
and will fail when executed on the server.

Additional context
My patch fixes this problem (https://github.com/kazemihabib/Huggingface-Agents-Course-Marimo-Edition/blob/marimo/patches/smolagents_patches.py)

To fetch source I am doing the following:

file_path = inspect.getabsfile(obj)
app = marimo._ast.codegen.get_app(file_path)
app._maybe_initialize()
all_cells = "\n".join([app._graph.cells[cell_id].code for cell_id in app._execution_order]).strip()

because of the way I am fetching the source, writing tests for that is not easy, so I have not created a PR for this issue yet.