Fix: Handled 3X3 Matrix transpose with the custom input matrix

[Pranava-Pai-N]

Resolves #9197

Changes:

• Fixed p5.Matrix.transpose() for 3x3 matrices when a p5.Matrix object is provided as input.
• Converted the provided matrix to its underlying mat3 values before transposing.
• Enabled regression tests for 3x3 matrix and array transpose behavior.
• Kept the existing array-input behavior unchanged.

PR Checklist

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

[p5-bot]

Continuous Release

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Commit hash: 154e077

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[perminder-17]

Looks good to me!

[Pranava-Pai-N]

@perminder-17 Thanks for the review and the merge, hoping to contribute to more issues in the repo soon.