Proper dev dependencies

Author: normanlorrain

pyproject.toml

@@ -4,14 +4,16 @@ version = "0.1.0"
 requires-python = ">=3.14"
 dependencies = [
     "mkdocs-material>=9.7.0",
-    "pillow>=12.2.0",
     "pygments~=2.20.0",
     "urllib3>=2.7.0",
 ]
 
 # Dependencies are managed from this `pyproject.toml` with `uv`, not `requirements*.txt`.
 # Install the project environment with `uv sync` and run tools/scripts with `uv run <command>`.
-[tool.uv]
-dev-dependencies = [
+[dependency-groups]
+dev = [
+    "pillow>=12.2.0",
+    "PyYAML>=6.0.1"
+
     # Add dev-only tools here when needed; they will be installed by `uv sync`.
 ]