[EHN] let `column_name` or `column_names` support callback type

[Zeroto521]

Brief Description

There always has an option called column_name or column_names. It's used to select the columns of df. The type could be a single value like Hashable and list values likes Iterable[Hashable]. And this idea is to support callback type.

_Originally posted by @ericmjl in https://github.com/pyjanitor-devs/pyjanitor/pull/1112#discussion_r895257358_

Example API

An implicit style and also a trick to select columns.

Select columns	Using callable type	Using Iterable type	df.columns
Select the first three columns	lambda df: df.columns[:3]	['a', 'b', 'c']	pd.Index(list('abcde'))
Select str type columns	lambda df: [i for i in df.columns if instance(i, str)]	['a', 'b', 'c']	pd.Index(['a', 'b', 'c', 1])

[samukweku]

For this, we can pass callables to select_columns