Initial change to pydata_sphinx_theme

This applies the pydata_sphinx_theme theme to NumPy Financial. The
theme builds and the documentation is rendered _almost_ correctly,
except that LaTeX is rendered to the far right of the page.

Author: Kai-Striega

doc/source/conf.py

@@ -20,7 +20,7 @@
 # -- Project information -----------------------------------------------------
 
 project = 'numpy-financial'
-copyright = '2019, numpy-financial developers'
+copyright = '2023, numpy-financial developers'
 author = 'numpy-financial developers'
 
 
@@ -50,7 +50,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'bizstyle'
+html_theme = 'pydata_sphinx_theme'
 html_copy_source = False
 
 # Add any paths that contain custom static files (such as style sheets) here,

pyproject.toml

@@ -49,6 +49,7 @@ pytest = "^7.4"
 [tool.poetry.group.docs.dependencies]
 sphinx = "^7.0"
 numpydoc = "^1.5"
+pydata-sphinx-theme = "^0.14.3"
 
 
 [tool.poetry.group.lint.dependencies]