Add external Python / napari resources and improve workshop / tutorial linking

[TimMonko]

📚 New content request

@willingc especially encouraged a ping on these resources.

The napari docs should include a handy list of external bioimage analysis resources, especially if they pertain directly to Python and napari. Note the napari workshops page is both woefully out of date and note exactly (to me) in an obvious spot in the docs.

The two absolutely go-tos that I use personally and recommend to every colleague:

1. Pete Bankhead's 'Introduction to Bioimage Analysis': A general overview of images, processing, and analysis with instructions in Python
2. Robert Haase @haesleinhuepf and colleagues' 'Bio-image Analysis Notebooks': Python image analysis, including many which use napari for visualization. Also teaches how to make magicgui widgets!

Realizing another very helpful one since it informs so much of napari logic:

1. scikit-image user guide

And maybe also compile other very helpful external tutorials and videos including

1. @DragaDoncila 's how to make a plugin tutorial
2. @jni's LIBRE_hub tutorials: videos and materials
3. A variety of VirtualI2K workshops from October 2024 (clesperanto, Jupyer Notebooks and Napari Widgets, napari-ndev, napari meets cellpose, SAM) and last years workshops including napari-image, napari-signal-selector, intersection of deconv, biofilQ, fundamental in Python, ultrack, Bioimage analysis with Python and napari,

Many more but I'm tired and wanted to stop procrastinating making this issue.

Outline