Add visualization for AM dataset cards.

[idalr]

In this PR, we add images in README.md's from https://github.com/ArneBinder/pie-document-level/tree/main/argumentation-mining/documentation/corpora, according to #96. As well, we review the information in those dataset cards one more time.

• aae2
• abstrct
• argmicro
• cdcp
• sciarg
• scidtb_argmin

The content in dataset_builders/hf/ would be migrated to HuggingFace/DFKI-SLT, once this PR is complete.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e8238db) 95.22% compared to head (c310e25) 95.22%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #97   +/-   ##
=======================================
  Coverage   95.22%   95.22%           
=======================================
  Files          22       22           
  Lines        1402     1402           
=======================================
  Hits         1335     1335           
  Misses         67       67           

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[ArneBinder]

Thanks, this looks very good. Just some minor points below.

Also, I just merged the content for the HF dataset cards (argmicro, cdcp, and scidtb_argmin), so you can delete the respective files from this PR.

Note: Next time, I think it is fine to directly create PRs for the respective HF dataset cards at https://huggingface.co/DFKI-SLT.