Resolves #8549

Changes

Fixes filter() crash when called on createGraphics(WEBGL) buffers.

Strands previously augmented only p5.prototype, but p5.Graphics does not inherit from it. When filter() executed on a p5.Graphics instance, strands callbacks (e.g. getTexture, vec*, dot, etc.) were missing, causing runtime errors.

This PR:

• Introduces two helpers:
  • augmentFn (permanent, unconditional overwrite)
  • augmentFnTemporary (temporary hook with restoration via graphicsOverrides)
• Mirrors all permanent strands API augmentations from p5.prototype onto p5.Graphics.prototype
• Mirrors temporary shader hooks during modify() and restores them in deinitStrandsContext
• Ensures createGraphics(WEBGL).filter() has access to the full strands API layer
• Prevents temporary hook leakage after modify() completes

WebGL unit tests and visual tests pass locally. Manual testing confirms the crash is resolved.

Screenshots of the change:

Manual test confirming no crash and correct behavior:

• createGraphics(WEBGL).filter(INVERT) runs without error
• Temporary hooks are cleaned up after execution

PR Checklist

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