fix: prevent noSmooth crash on p5.Graphics (resolves #8264)

[Rudrxxx]

Resolves #8264

Changes:

This PR fixes a crash when calling noSmooth() on a p5.Graphics object in p5.js 2.0, which previously resulted in:

What was done:

• Updated src/shape/attributes.js to safely route through
  renderer.setSmoothing(false) when available.
• Added a fallback that manually disables
  drawingContext.imageSmoothingEnabled for cases where setSmoothing or setAttributes do not exist.
• Ensures noSmooth() works consistently on:
  • Main canvas (2D)
  • p5.Graphics 2D buffers
  • p5.Graphics WebGL buffers (the crash case)

Manual test pages added:

• test/manual/noSmooth/canvas-2d.html
• test/manual/noSmooth/graphics-webgl.html

These test pages verify that noSmooth() runs without errors and logs success messages in the console.

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Screenshots of the change:

Console output after fix:

• Main Canvas (2D):
  Main Canvas: noSmooth OK

• WebGL p5.Graphics:
  WebGL p5.Graphics: noSmooth OK

No crashes, no TypeErrors.

---

PR Checklist

• npm run lint passes
• Inline reference is included / updated
• Unit tests are included / updated (manual tests added for now)

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