Added Aligned Words List Output

[qiisziilbash]

Sometimes one needs to get lists of aligned words from the given sentences.

This PR extracts that logic from _construct_comparison_string into get_alignment_words and exposes it publicly to be used when one needs to process aligned words.

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[nikvaessen]

Why not simply extract them from https://jitsi.github.io/jiwer/reference/process/#process.WordOutput?

[qiisziilbash]

Why not simply extract them from https://jitsi.github.io/jiwer/reference/process/#process.WordOutput?

I might be missing something; but the input for the function I added (i.e. get_alignment_words) is the process.WordOutput, no? So I am using that to make these list. Also logic for get_alignment_words was already in the _construct_comparison_string; I just broke it to its own function that can be used publicly/separately as well.