Add formatting steps to the pull request template

[Supriyasus]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.51%. Comparing base (e63ba4b) to head (1fc25c3).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5605      +/-   ##
============================================
+ Coverage     73.50%   73.51%   +0.01%     
- Complexity     5097     5099       +2     
============================================
  Files           657      657              
  Lines         17625    17625              
  Branches       3393     3393              
============================================
+ Hits          12955    12957       +2     
  Misses         4166     4166              
+ Partials        504      502       -2     

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[siriak]

But we don't use neither Black nor Flake8 in our CI pipelines, why are you suggesting using them?

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution!

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution!