DOC: Update pydata-sphinx-theme to 0.14 (#55885)

* DEPS: Unpin pydata-sphinx-theme

* Pin to 0.14

* update switcher_version

* Add preferred version

---------

Co-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

doc/source/conf.py

@@ -230,11 +230,13 @@
 # further.  For a list of options available for each theme, see the
 # documentation.
 
-switcher_version = version
 if ".dev" in version:
     switcher_version = "dev"
 elif "rc" in version:
     switcher_version = version.split("rc", maxsplit=1)[0] + " (rc)"
+else:
+    # only keep major.minor version number to match versions.json
+    switcher_version = ".".join(version.split(".")[:2])
 
 html_theme_options = {
     "external_links": [],
@@ -246,11 +248,13 @@
         "plausible_analytics_url": "https://views.scientific-python.org/js/script.js",
     },
     "logo": {"image_dark": "https://pandas.pydata.org/static/img/pandas_white.svg"},
+    "navbar_align": "left",
     "navbar_end": ["version-switcher", "theme-switcher", "navbar-icon-links"],
     "switcher": {
         "json_url": "https://pandas.pydata.org/versions.json",
         "version_match": switcher_version,
     },
+    "show_version_warning_banner": True,
     "icon_links": [
         {
             "name": "Mastodon",

environment.yml

@@ -86,7 +86,7 @@ dependencies:
   - google-auth
   - natsort  # DataFrame.sort_values doctest
   - numpydoc
-  - pydata-sphinx-theme=0.13
+  - pydata-sphinx-theme=0.14
   - pytest-cython  # doctest
   - sphinx
   - sphinx-design

requirements-dev.txt

@@ -61,7 +61,7 @@ gitdb
 google-auth
 natsort
 numpydoc
-pydata-sphinx-theme==0.13
+pydata-sphinx-theme==0.14
 pytest-cython
 sphinx
 sphinx-design

web/pandas/versions.json

@@ -7,7 +7,8 @@
     {
         "name": "2.1 (stable)",
         "version": "2.1",
-        "url": "https://pandas.pydata.org/docs/"
+        "url": "https://pandas.pydata.org/docs/",
+        "preferred": true
     },
     {
         "name": "2.0",