[INFRA] change issue template into a github form

[Remi-Gau]

Suggested in an issue on the datalad handbook repo: datalad-handbook/book#768 (comment)

This transforms the markdown based issue template into a yml that will render as a github issue form that are both more user friendly and may prevent users having to delete placeholders...

The result can be previewed here: https://github.com/Remi-Gau/datalad/issues/new?assignees=&labels=&template=issue_template.yml

• If you would like to list yourself as a DataLad contributor and your name is not mentioned please modify .zenodo.json file.

[codecov]

Codecov Report

Merging #6048 (4ce9b7b) into master (5b06004) will decrease coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6048      +/-   ##
==========================================
- Coverage   89.85%   89.71%   -0.15%     
==========================================
  Files         319      319              
  Lines       42401    42401              
==========================================
- Hits        38099    38038      -61     
- Misses       4302     4363      +61     

Impacted Files	Coverage Δ
datalad/ui/utils.py	56.25% <0.00%> (-21.88%)	⬇️
datalad/core/local/tests/test_results.py	92.85% <0.00%> (-7.15%)	⬇️
datalad/customremotes/tests/test_ria_utils.py	97.10% <0.00%> (-2.90%)	⬇️
datalad/core/local/tests/test_diff.py	97.23% <0.00%> (-2.31%)	⬇️
datalad/interface/tests/test_unlock.py	97.95% <0.00%> (-2.05%)	⬇️
datalad/core/distributed/clone.py	89.26% <0.00%> (-1.79%)	⬇️
datalad/runner/tests/test_witless_runner.py	93.61% <0.00%> (-1.42%)	⬇️
datalad/interface/tests/test_rerun.py	98.46% <0.00%> (-1.15%)	⬇️
datalad/cmdline/tests/test_main.py	83.70% <0.00%> (-1.13%)	⬇️
datalad/interface/tests/test_diff.py	99.09% <0.00%> (-0.91%)	⬇️
... and 12 more

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[adswa]

Thank you! I find these issue templates to be much more accessible and structured; I'd be happy to see them in this repo.

[mih]

Wonderful! Thx much!