feat(objwriter): add support for vtkOBJWriter

[daker]

fix #2404

Context

Add support for vtkOBJWriter

const writer = vtkOBJWriter.newInstance();
writer.setInputData(source.getOutputData());
writer.setTexture(tex);

// const objContent = writer.getOutputData();
// const mtlContent = writer.getMtl();

const zip = writer.exportAsZip();
zip.then((zipData) => {
    const blob = new Blob([zipData], { type: 'application/zip' });
    const url = URL.createObjectURL(blob);
    console.log(url);
});

Results

Changes

• Documentation and TypeScript definitions were updated to match those changes

PR and Code Checklist

• semantic-release commit messages
• Run npm run reformat to have correctly formatted code

Testing

• This change adds or fixes unit tests
• Tested environment:
  • vtk.js:
  • OS:
  • Browser:

[jourdain]

LGTM

[jourdain]

I'm ok with the code, knowing that there is some limitation in the current implementation as only one texture can exist.

[daker]

@floryst ready for a merge 👍🏼