feat(ConnectivityFilter): add vtkConnectivityFilter

[qianlishun]

Context

add vtkConnectivityFilter
Use BFS to find connected regions and extract regions

Results

Changes

only add .js, no .ts

PR and Code Checklist

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

Testing

• This change adds example tests
• Tested environment:
  • vtk.js:
  • OS:
  • Browser:

[finetjul]

I have not looked closely, but if the algorithm differs from the C++ vtkConnectivityFilter, you would need to come up with a different filter name.

Please :

• add an index.d.ts file
• add a screenshot for the example image gallery
• consider using existing functions such as getCellPoints() and getPointCells().

Thanks !

[qianlishun]

I have not looked closely, but if the algorithm differs from the C++ vtkConnectivityFilter, you would need to come up with a different filter name.

Please :

• add an index.d.ts file
• add a screenshot for the example image gallery
• consider using existing functions such as getCellPoints() and getPointCells().

Thanks !

The filter has been renamed as BFSConnectivity Filter;
Added index.d.ts and screenshot
The polydata method has been used to replace the original.

Please review.
Thanks !