Changes:
- Rewrite buffer using context manager
- Introduce an experimental viewer based on trame and vanilla vtk-js
<a href="https://github.com/edsaac/streamlit-PyVista-viewer"><img alt="stpyvista source code" src="https://img.shields.io/static/v1?label=:&message=Source%20code&color=informational&logo=github"></a>
<a href="https://pypi.org/project/stpyvista/"><img alt="stpyvista pypi version" src="https://badgen.net/pypi/v/stpyvista"></a>
<a href="https://github.com/edsaac/stpyvista-tests"><img alt="stpyvista examples repository" src="https://img.shields.io/static/v1?label=:&message=Examples&color=ff4b4b&logo=github"></a>
<a href="https://github.com/edsaac/stpyvista-tests"><img alt="Launch stpyvista in Streamlit" src="https://img.shields.io/static/v1?label=:&message=Open%20in%20Streamlit&color=pink&logo=streamlit"></a>