[Term Entry] Python:NumPy built-in-functions trace

[codecademy-gh-api]

Reason/inspiration (optional)

We would like a new term entry on the built-in-functions term for Numpy: matrix trace. The entry should go in a new file under docs/content/numpy/concepts/built-in-functions/terms/trace/trace.md.

The entry should describe the term and how it is used within statistical analysis. Also include:

• An "Example" section that explains readers how to use the trace function to find the trace of a square matrix.
• Should contain informations for functions and syntax.
• Should have a python codebyte with working code snippet showcasing this function. Please refer to the entry templates, content standards, and markdown style guide when working on the PR for this issue.

Entry Type (select all that apply)

New Term for Existing Concept Entry

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