feat: Experimental transpilation of unannotated python callables

[TrevorBergeron]

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Fixes #<issue_number_goes_here> 🦕

[gemini-code-assist]

Code Review

This pull request introduces an experimental Python transpiler feature, allowing standard Python callables to be transpiled and executed within DataFrame.map, DataFrame.apply, Series.apply, and Series.combine. It replaces the func_to_op helper with func_to_expr, which generates a new CallableExpression to manage argument binding. Feedback on the changes highlights critical validation gaps in both DataFrame.apply and CallableExpression.apply where missing checks for unexpected keyword arguments, duplicate arguments, or extra positional arguments could lead to silent correctness bugs or cryptic errors.