Recommend uv for local development

.github/dependabot.yml

@@ -8,3 +8,11 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+  - package-ecosystem: "uv"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    groups:
+      all-dependencies:
+        patterns:
+          - "*"

doc/internals/contributing.rst

@@ -93,17 +93,29 @@ These are the basic steps needed to start developing on Sphinx.
       git clone https://github.com/<USERNAME>/sphinx
       cd sphinx
 
-#. Setup a virtual environment.
+#. Install uv and set up your environment.
 
-   This is not necessary for unit testing, thanks to :program:`tox`,
-   but it is necessary if you wish to run :program:`sphinx-build` locally
-   or run unit tests without the help of :program:`tox`:
+   We recommend using :program:`uv` for dependency management.
+   Install it with:
 
    .. code-block:: shell
 
-       virtualenv ~/.venv
-       . ~/.venv/bin/activate
-       pip install -e .
+      python -m pip install -U uv
+
+   Then, set up your environment:
+
+   .. code-block:: shell
+
+       uv sync
+
+   **Alternative:** If you prefer not to use :program:`uv`, you can use
+   :program:`pip`:
+
+   .. code-block:: shell
+
+       python -m venv .venv
+       . .venv/bin/activate
+       python -m pip install -e .
 
 #. Create a new working branch. Choose any name you like.
 
@@ -167,8 +179,9 @@ Style and type checks can be run as follows:
 
 .. code-block:: shell
 
-    ruff check .
-    mypy
+    uv run ruff check
+    uv run ruff format
+    uv run mypy
 
 
 Unit tests
@@ -205,7 +218,14 @@ You can also test by installing dependencies in your local environment:
 
   .. code-block:: shell
 
-     pip install . --group test
+     uv run pytest
+
+Or with :program:`pip`:
+
+  .. code-block:: shell
+
+     python -m pip install . --group test
+     pytest
 
 To run JavaScript tests, use :program:`npm`: