Easy getter methods for the file meta table about dicom-rs

[Enet4]

@PierreBou91 You're right, I ended up adding these helper methods over time. Thanks for the heads up.

There are a few other issues with the good first issue label, such as #46, but if you are interested in tackling some other task recorded here, feel free to let me know through that issue or reach out to me on Zulip.

[PierreBou91]

Hi @Enet4 ,
I was browsing the good first issues to try to improve my Rust and dicom understanding when I saw this one.
When I went to the FileMetaTable methods, I could see that you added the getter in this commit and that it was merged.

So my question is the following, is it just that this issue should be closed or is there some more work I could help with ? If it's the case, could you provide a bit of guidance as to where I should start to handle this issue ?

Thanks a lot,

Pierre