Dclab

- setup: the s3 extra does not require a specific version of urllib3
- ci: use main branch of GH Actions actions to reduce maintenance burden

- fix: speed-up S3 availability check (245)
- enh: allow to specify list of features for data copier
- ref: migrate from s3fs to boto3 for fmt_s3
- test: data copier with `none` and invalid features
- docs: remove pin for sphinx
- build: make musllinux builds for e.g. docker images

- fix: RTDCWriter.rectify_metadata fails when image feature is empty
- fix: handle empty write requests in export.hdf5 and RTDCWriter (242)
- tests: add test for writing all-nan data (242)
- docs: improve documentation of hierarchy child mapper

- fix: integer overflow in downsample_grid
- fix: removed unnecessary computation of hierarchy filter instance
- enh: cythonize downsample_grid (~10x speed-up)
- enh: got rid of for-loop in map_indices_parent2child (~100x speed-up)
- enh: slight improvement of managing manual indices in hierarchy children
- enh: added dtype properties for contour and trace events
- enh: ensure all feature data objects have the dtype property
- enh: globally use chunk sizes of ~1MiB when writing HDF5 data (217)
(minor speedup since previously a chunk size of 100 events was used
for images and scalar features were written in one big chunk)
- enh: favor array operations in `yield_filtered_array_stacks` (~4x speed-up)
- enh: increase verbosity for unreachable remote basin features
- ref: implement `__array__` methods for hierarchy event classes
- ref: implement `__array__` method for `H5MaskEvent`
- ref: new submodule for hierarchy format

- fix: regression missing check for basin availability

- enh: perform basin availability checks in daemon thread