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

Updated documentation. What is still missing in my opinion:

• Examples for connected components. Processing and plot
• Refactoring of random colormap function. It is now called as qim3d.viz.objects which I find quite misleading. Consider moving to utils and rename the function
• Examples for functions under utils.
• Thoroughly documentation of the Unet with examples including the functions grid_overview and grid_predunder qim3d.vizwhich is currently not a par tof the documentation
• Examples for annotation tool under GUI
• Probably a lot more

docs/io.md

@@ -18,17 +18,10 @@ Currently, it is possible to directly load `tiff`, `h5`, `nii`,`txm`, `vol` and
     loaded_vol = qim3d.io.load("blobs.tif")
     ```
 
-::: qim3d.io.load
+::: qim3d.io
     options:
         members:
             - load
-
-::: qim3d.io.save
-    options:
-        members:
             - save
-
-::: qim3d.io.downloader
-    options:
-        members:
-            - Downloader
\ No newline at end of file
+            - Downloader
+            - ImgExamples
\ No newline at end of file