feat: add FitsFile::file_path
method to access FitsFile
file path
#367
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Include a method to access the file path of the
FitsFile
.During my investigation I found that there was no reason to make it optional. Given this, I have made the field/function return non-optional as well.
Also: it is stored as a
PathBuf
internally, and inherently refers to a path on disk, so let's return aPath
in that case.Closes #366