Extending the rem() method of p5.Vector to n dimensions.

[atif09]

Resolves #8188

Changes:

• Extend p5.Vector.rem() so it correctly computes remainders for vectors with more than three numeric components and keep existing 2D/3D behavior unchanged

PR Checklist

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

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