chore: add issue form templates

[piksel]

This PR adds issue form templates that makes it easier to fill out issues and redirect non-issues to the appropriate places.

I certify that I own, and have sufficient rights to contribute, all source code and related material intended to be compiled or integrated with the source code for the SharpZipLib open source product (the "Contribution"). My Contribution is licensed under the MIT License.

[codecov]

Codecov Report

Merging #817 (36a97b8) into master (68e2f92) will not change coverage.
The diff coverage is n/a.

❗ Current head 36a97b8 differs from pull request most recent head ef520bd. Consider uploading reports for the commit ef520bd to get more accurate results

@@           Coverage Diff           @@
##           master     #817   +/-   ##
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  Coverage   74.78%   74.78%           
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  Files          72       72           
  Lines        8535     8535           
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  Hits         6383     6383           
  Misses       2152     2152           

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