Issue with WaveFront OBJ meshes

Here is the same mesh as a [WaveFront .obj file](https://drive.google.com/file/d/1XxPTsie1KagO4peaYyUzOBvSAKvZVAg_/view?usp=drive_link) nd [STL format mesh](https://drive.google.com/file/d/1CKhl80nhYPLS5nnkxWjceY6s0YkN5ujE/view?usp=drive_link). I can easily convert the vtk format file, but the converting the obj file results in a iwm.cbor file that has nonsense values.

```python
from itkwasm_image_io import imread, imwrite
from itkwasm_mesh_io import meshread, meshwrite
mesh = meshread('brain.obj')
meshwrite(mesh, 'brainOBJ.iwm.cbor')
mesh = meshread('brain.stl')
meshwrite(mesh, 'brainSTL.iwm.cbor')
mesh = meshread('brain.vtk')
meshwrite(mesh, 'brainVTK.iwm.cbor')
```

The cells from the STL file are BigUint64Array with each triangle listed as `2 3 i j k` where `2` is indicates a triangle type and 3 indicates that three indices follows, with i j k being the indices:

In contrast, all the values for the converted OBJ files are huge - out of range of all triangles and of invalid cell types:


3DSlicer, Meshlab, Surfice and NiiVue all open the OBJ file fine. I note that the [ITK code](https://github.com/InsightSoftwareConsortium/ITK/blob/f43b1b8977fa05d169c14b4c6f44ce35992a3959/Modules/IO/MeshOBJ/src/itkOBJMeshIO.cxx#L163) is designed to read faces (`f`), vertices (`v`) and the [optional](https://en.wikipedia.org/wiki/Wavefront_.obj_file#Vertex_normal_indices) vertex normals (`vn`), while this file only has vertices and faces, so perhaps ITK demands the normals.

Start with the Python reproduction using meshread and meshwrite on the linked OBJ and STL files, then compare the generated iwm.cbor cell arrays. Read the referenced Modules/IO/MeshOBJ/src/itkOBJMeshIO.cxx OBJ reader, focusing on face and vertex handling. Done means OBJ conversion produces valid triangle cell types and in-range indices like the STL conversion.

Written by the indexing model from the issue text.