Updated visualization. Added new functions to documentation. Updated...

docs/assets/screenshots/blob_detection.gif

docs/assets/screenshots/blob_get_mask.gif

docs/assets/screenshots/filter_original.png

docs/assets/screenshots/filter_processed.png

docs/assets/screenshots/local_thickness_2d.png

docs/assets/screenshots/local_thickness_3d.gif

docs/assets/screenshots/structure_tensor.gif

docs/io.md

docs/processing.md

docs/releases.md

docs/viz.md

qim3d/io/__init__.py

qim3d/io/downloader.py

qim3d/io/loading.py

qim3d/io/saving.py

qim3d/processing/__init__.py

qim3d/processing/cc.py

qim3d/processing/detection.py

qim3d/processing/filters.py

qim3d/processing/local_thickness_.py