Bug#1084781: pydata-sphinx-theme missing templates etc

[Rebecca N. Palmer]

Control: retitle -1 pydata-sphinx-theme missing templates etc
Control: reassign -1 python3-pydata-sphinx-theme

On further investigation, it looks like the 
pydata_sphinx_theme/theme/pydata_sphinx_theme directory *does* exist in 
the source, but isn't being installed in the package, i.e. the bug is in 
pydata-sphinx-theme not pandas.

This suggests that the immediate fix is to create a 
python3-pydata-sphinx-theme.install file that lists this directory. 
(See the dh_install documentation.)  I haven't tried that yet, but 
intend to.

This directory replaces pydata_sphinx_theme/_templates, which was 
installed in the previous package.  I don't know why it was and this one 
isn't, as nothing in the packaging obviously refers to _templates.  It 
*might* be because some build tool recognizes the old one but not the 
new one as a standard part of Sphinx themes.

(I don't think the problem is the version of Sphinx itself, as the 
upstream dependency says sphinx>=5 and we have 7.x, but it might be the 
version of that build tool.)