Use dependency group for dev dependencies

Author: hmpf

pyproject.toml

@@ -55,20 +55,32 @@ dynamic = ["version"]
 [project.optional-dependencies]
 htmx = []  # for outdated install procedures
 docs = ["sphinx>=2.2.0"]
+
+[dependency-groups]
 dev = [
     "django-debug-toolbar",
-    "coverage",
     "django-extensions",
     "ruff",
     "djlint",
     "ipython",
     "pre-commit",
     "python-dotenv",
-    "towncrier",
     "werkzeug",
+    "towncrier",
+    {include-group = "build"},
+    {include-group = "docs"},
+    {include-group = "test"},
+]
+test = [
+    "coverage",
     "tox>=4",
+]
+build = [
     "build",  # for debugging builds/installs
 ]
+docs = [
+    "sphinx>=2.2.0",
+]
 
 [tool.hatch.version]
 source = "versioningit"