Skip empty sequences when streaming with ndarrays

[mattpap]

fixes #14004

[mattpap]

I improved the typing situation and added numpy to bokeh info to make sure what version we are working with.

[mattpap]

Finally I added print_info() function equivalent to bokeh info, used like this:

$ git diff
diff --git a/examples/basic/scatters/color_scatter.py b/examples/basic/scatters/color_scatter.py
index 1f3770efa7..a7d62cbef9 100644
--- a/examples/basic/scatters/color_scatter.py
+++ b/examples/basic/scatters/color_scatter.py
@@ -10,6 +10,9 @@ many different plot tools.
 import numpy as np
 
 from bokeh.plotting import figure, show
+from bokeh.util.info import print_info
+
+print_info()
 
 N = 4000
 x = np.random.random(size=N) * 100

$ BOKEH_DEV=true python examples/basic/scatters/color_scatter.py 
Python version        :  3.12.3 | packaged by conda-forge | (main, Apr 15 2024, 18:38:13) [GCC 12.3.0]
IPython version       :  8.19.0
Tornado version       :  6.3.3
NumPy version         :  2.0.1
Bokeh version         :  3.6.0.dev1+20.gb902fb51
BokehJS static path   :  /home/anaconda/repo/bokeh/bokehjs/build
node.js version       :  v20.12.2
npm version           :  10.8.2
jupyter_bokeh version :  4.0.5
Operating system      :  Linux-5.15.0-113-generic-x86_64-with-glibc2.35

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