Feat/matrix rref status

[weiseng18]

Problem

Want to add functionality that returns if a matrix is in REF, RREF, or neither.

Solution

The functionality was already implemented in Matrix.echelonStatus(). However, this was not exposed in the API. Thus this PR helps to expose it in the API.

Checklist

• If the branch was not created off latest develop, merge locally
• Using latest develop and master, do git diff --stat master while in develop branch. Ensure that the diff is not too large
• If this is a feature, has appropriate documentation been added?

Notes

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/weiseng18/math/Dwe5yUAEbsAU8u5U3QXfFJpNyUoP
✅ Preview: https://math-git-feat-matrix-rref-status-weiseng18.vercel.app