[BUG][LSP]: LSP can't track PythonObject usage

[ehsanmok]

Bug description

vscode LSP complains that PythonObject value is unused

from python.object import PythonObject

fn main() raises:
    var py_lst: PythonObject = []
    py_lst.append(1)
    print(py_lst)

Steps to reproduce

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• If applicable, add screenshots to help explain the problem.
• If using the Playground, name the pre-existing notebook that failed and the steps that led to failure.
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System information

- What OS did you do install Mojo on ? Ubuntu 22.04
- Provide version information for Mojo by pasting the output of `mojo -v`: mojo 24.1.0 (c176f84d)
- Provide Modular CLI version by pasting the output of `modular -v`: modular 0.5.1 (1b608e3d)

[River707]

This was a general Mojo parser issue, but should be fixed in the next release!