Jupyterlab-h5web

- Now using `jupyterlab_h5web` instead of `jupyterlab_hdf` to serve HDF5 files contents. This fixes the following issues:
- The path given to `H5Web` widget is now resolved relatively to the working directory and can be absolute 37
- Add support for external links 39
- Handle base directory correctly for JupyterLab 3.x 41
- Updated h5web to [0.0.24](https://github.com/silx-kit/h5web/releases/tag/v0.0.24)
- Changed dark mode implementation 32

h5web can be used in notebooks :notebook: ! :tada:
[Demo available on Binder !](https://mybinder.org/v2/gh/silx-kit/jupyterlab-h5web/HEAD?urlpath=lab/tree/example.ipynb)


Release notes

- Updated `h5web/app` to [0.0.14](https://github.com/silx-kit/h5web/releases/tag/v0.0.14)
- Added `H5Web` notebook widget to `jupyterlab_h5web` Python package

- Updated `h5web/app` from 0.0.11 to 0.0.13.

- Updated `h5web/app` to version [0.0.11](https://github.com/silx-kit/h5web/releases/tag/v0.0.11)
- h5web has now a dark theme displayed when the JupyterLab's dark theme is on

- Added optional support of filters through `hdf5plugin`
- Added `.nexus`, `.nx`, `.nxs` and `.cxi` to the supported extensions
- Fixed unwanted background changes when switching themes in JupyterLab

- Added wheels to the package