How about adding `real32` support?

[zoziha]

csv-module is very easy to use, thanks, @jacobwilliams !

Description

Both real32 and real64 are commonly used floating point precisions, although we can modify wp=>real64 to wp=>real32 in csv_kinds.
But if csv-module supports real32 and real64 at the same time, is it possible?

If it is worth a PR

I submitted support for real32 here. I don’t know if it is worth submitting a PR?
What I did is:

• Add sp=>real32 in csv_kinds;
• Add to_real_sp, rename to_real to to_real_wp;
• Add get_real_sp_column, rename get_real_column to get_real_wp_column;
• Add a test_csv_sp test.

Addition

toml-f also only supports double precision at the beginning, maybe for convenience, it now supports single precision and double precision floating point types.

[jacobwilliams]

Yes, I'd be happy to accept a PR to add real32 support.