Add citation file

[danielfromearth]

GitHub Issue: #118

Description

This change adds a citation file.

Local test steps

N/A

Overview of integration done

N/A

PR Acceptance Checklist

• [N/A] Unit tests added/updated and passing.
• [N/A] Integration testing
• [x] CHANGELOG.md updated
• [x] Documentation updated (if needed).

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📚 Documentation preview 📚: https://ncompare--119.org.readthedocs.build/en/119/

[codecov-commenter]

Codecov Report

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

Comparison is base (6e3bc89) 89.95% compared to head (ea7b017) 89.95%. Report is 1 commits behind head on develop.

:exclamation: Current head ea7b017 differs from pull request most recent head fd11eca. Consider uploading reports for the commit fd11eca to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #119 +/- ## ======================================== Coverage 89.95% 89.95% ======================================== Files 5 5 Lines 468 468 ======================================== Hits 421 421 Misses 47 47 ```

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