.rename() and .alias()

[Nekobaex]

Describe your feature request

Hello, I have noticed that in the nodejs-polars library,
the .rename() function can be called by Series, DataFrame,
while the .alias() function can be called by Series, Expr.
These two functions serve the same purpose,
but I was wondering if it would be possible to make one of them applicable to all three types: Series, DataFrame, and Expr.

Thank you!

[Bidek56]

@Nekobaex nodejs-polars keeps functionality on par with Python Polars
I believe .rename() and .alias() functionality is the same as in Python Polars

It makes sense, since df.select(pl.col("foo")) results in an expression which then can be aliased.