Automatically parse datetimes with 12-hour time (AM/PM)

[daviewales]

Description

Polars currently doesn't support automatically parsing datetimes with 12 hour time using AM/PM.
For example, the following datetimes are not automatically parsed:

1/02/2024 11:01:21 PM
01/02/2024 9:00:00 am
2024-02-01 9:00:00 AM

It's possible to specify 12 hour formats as follows:

%Y-%m-%d %I:%M:%S %P  # 2024-01-01 11:00:00 AM
%Y-%m-%d %I:%M:%S %p  # 2024-01-01 11:00:00 am

i.e. The same as other formats, but replace %H with %I, and add %P or %p to the end for the AM/PM marker.

I'm guessing this could be fixed by extending the list of supported formats here:
https://github.com/pola-rs/polars/blob/main/crates/polars-time/src/chunkedarray/string/patterns.rs

Is there a reason not to automatically parse these datetime styles?