style: Clean-up issue/PR templates to make them more concise

[ozankabak]

Description

Closes #22.

What is Changed

Updates issue templates to reduce cruft.

Checklist:

• [x] Tests that cover the code added.
• [x] Corresponding changes documented.
• [x] All tests passed.
• [x] The code linted and styled (pre-commit run --all-files has passed).

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.90%. Comparing base (39e3eb0) to head (8b8842c). Report is 2 commits behind head on main.

@@           Coverage Diff           @@
##             main      #23   +/-   ##
=======================================
  Coverage   85.90%   85.90%           
=======================================
  Files          61       61           
  Lines       15249    15249           
=======================================
  Hits        13100    13100           
  Misses       2149     2149           

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