[p5.js 2.0] Refactor MatrixNumJs to new generic Matrix API

[holomorfo]

Addresses #6765

@limzykenneth @davepagurek: Please review my changes.

Changes:

This PR updates the MatrixNumJs implementation to match the latest Matrix API interface, the most noticeable changes are the following:

• Replace the mat3 and mat4 definitions for a generic matrix and sqDimention to keep track of a single generic square matrix.
• Create getters for mat3 and mat4 so its still accessible to all the existing calls in the library.
• Create generic invert, transpose and rotate to match the generic Matrix API.
• No update on unit tests was necessary because the goal is to make it 100% compatible to the existing calls.
• Added a missing set dimension in the Matrix.set method.
• Added benchmark for 3x3 and 4x4 multiplication where it clearly shows that that the gl implementation is much faster than the NumJs

Since the NumJs implementation I understand is still in testing process wanted to ask if we should merge the numjs package.json dependency, or should this be kept in another branch? I have updated the package and lock files to make sure everything works, but please let me know what you think would be best. Thanks

Analysis

PR Checklist

• npm run lint passes
• Inline reference is included / updated
• Unit tests are included / updated