Add "new" Bool data type

[Chocrates]

I am trying to play with JWST data with this library and have run into an error. Note I know almost nothing about FITS, just what I can grok from the Wiki page and selected reading in the spec and other places.

With this small code:

use fitsio::FitsFile;

fn main() {
    let filename = String::from("/home/chris/Downloads/MAST_2023-07-19T1303/JWST/jw02731-o001_t017_nircam_clear-f090w/jw02731-o001_t017_nircam_clear-f090w_i2d.fits");
    let mut fptr = FitsFile::open(filename).unwrap();

    fptr.pretty_print().expect("oops");
}

I am getting this error:

thread 'main' panicked at 'Have not implemented str -> ColumnDataType for L'

So it appears that the JWST data has a table data type that we don't expect. Looking at the astropy site for data table types (I have not been successful so far finding the table data types in the official docs) it lists the L format as a Boolean.
Making that change, compiling and sourcing this library from the locally compiled library allows me to pretty print the FITS file.

Any idea what is going on? I doubt my change is the correct thing to do since in our tables.rs it is listing Booleans as B data type.

You can find the JWST files on the MAST site using this query if you are interested (about 20gb of data for all of them)

[coveralls]

coverage: 77.393% (-0.07%) from 77.464%
when pulling 0baec0f on Chocrates:main
into 9f516d5 on simonrw:main.

[simonrw]

Hi, sorry for the late response, I didn't see this PR fly by 🤦

I am happy to merge this change if the fix works for you. I won't be releasing a new version of the crate any time soon, so you will have to add fitsio as a git dependency for now.