morphTargets count in the generated report

This is not a bug, but rather a feature request.

Along with this information:
```json
"animationCount": 1,
"materialCount": 1,
"hasMorphTargets": true,
"hasSkins": false,
"hasTextures": true,
"hasDefaultScene": true,
"drawCallCount": 1,
"totalVertexCount": 31415,
"totalTriangleCount": 59880,
"maxUVs": 1,
"maxInfluences": 0,
"maxAttributes": 4,
```

It would be helpful if number of `morphTargets` is also added here.

Start by locating the code that assembles the generated report and handles the existing hasMorphTargets and count fields. Add the number of morph targets alongside the listed report values, then verify that generated reports include the new field with the expected count.

Written by the indexing model from the issue text.