chore: Update missing or outdated files

[pyansys-automation]

The following files were added or updated:

• CODE_OF_CONDUCT.md file containing the contributor covenant code of conduct
• CONTRIBUTING.md file with contribution guidelines specific to the repository

Important

Replace {project-name} with the name of the project in the CONTRIBUTING.md file. For example, the project name for ansys/pymechanical is PyMechanical.

---

This pull request was created by a bot. If you have any questions, please ping the PyAnsys Core team for assistance. To ping the team write a comment in this issue with the following mention: @ansys/pyansys-core.

If you want this repository to be excluded from this automated maintenance process, please let us know by filling in the opt-out request form.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.69%. Comparing base (bf6115e) to head (9bbb457).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4330      +/-   ##
==========================================
- Coverage   91.18%   87.69%   -3.50%     
==========================================
  Files         195      195              
  Lines       15969    15969              
==========================================
- Hits        14562    14004     -558     
- Misses       1407     1965     +558     

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.