rename get_columns_by_name to select

[MarcoGorelli]

"get_columns_by_name" has been annoying me for a while. Someone has even commented that there's no need to note that this API is developer-focused, as with such an anti-ergonomic name, no user would ever consider using it anyway 😄
Then, the following question from a user has prompted me to finally suggest renaming it:

I'm suggesting select because it's already kind of a standardised name:

• in SQL, you select columns with select
• pyspark has DataFrame.select
• polars has DataFrame.select
• dplyr (R) has select

Q: what about get_column_by_name?

Let's wait until after Thursday's call to discuss this one, depending on the decision that's taken with Column

[MarcoGorelli]

this was verbally approved in the last call

if there's no objections, will merge later this week