feat: Export CommitPulse City as a 3D Printable Model (.stl)

[Goutam-2702]

Resolves #8142

Adds the ability to export the commit history as a true 3D model (.stl) that can be imported into 3D rendering environments or physically printed.

[vercel]

@Goutam-2702 is attempting to deploy a commit to the jhasourav07's projects Team on Vercel.

A member of the Team first needs to authorize it.

[retenta-bot]

This PR introduces the ability to export commit history as a 3D printable model, which aligns with our ongoing efforts to enhance export functionalities, similar to the previously validated PDF export feature for the CommitPulse badge. This addition will provide users with more versatile options for visualizing their data. Looking forward to your feedback on this exciting feature!

[github-actions]

🚨 Hey @Goutam-2702, the CI Pipeline is failing on this PR and it has been marked as status:blocked.

Please fix the issues before this can be reviewed. Here's how:

1. Run checks locally before pushing:

npm run format:check   # Check Prettier formatting
npm run lint           # Run ESLint
npm run typecheck      # TypeScript type check
npm run test           # Run unit tests (Vitest)
npm run build          # Verify production build passes

2. Auto-fix common issues:

npm run format         # Auto-fix formatting with Prettier
npm run lint -- --fix  # Auto-fix lint errors where possible

3. Check the full failure log here:
👉 View CI Run

Once you push a fix and the CI passes, the status:blocked label will be removed automatically. 💪