fix(font): avoid serializing full p5.Font data in previewEntry and IDE hook

[lirenjie95]

Fixes #3441

Changes:

• In previewEntry.js, add handleP5Font to extract only essential fields instead of the entire font data.
• In useHandleMessageEvent.js, update restoreP5Font to reconstruct a simplified font‐like object for console display.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123

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[raclim]

Thanks so much for your patience and for looking into this @lirenjie95!

I think working within the two files, useHandleMessageEvent.js and previewEntry.js make sense to me so far. On a manual testing front, I'm still encountering the error on my end—if there's anything you think I might be missing, or if you happen to have any screenshots or a video of your process, feel free to share!

Also as a heads up: we may end up merging (#3424) first since it came in earlier. That one might cause some merge conflicts with this PR. If you have any thoughts on that PR, whether in general or in relation to your work here, please feel free to weigh in!