Fix CI: add doc8 to doc group, remove stale *.py glob from quality target

- Add doc8 to the doc dependency group (was missing, needed by tox docs env)
- Remove *.py glob from quality make target (setup.py no longer exists)
- Remove --recursive flag from isort (deprecated in isort 5.x)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: farhan

Makefile

@@ -34,11 +34,11 @@ upgrade: ## update the uv.lock file with the latest packages satisfying pyprojec
 	uv lock --upgrade
 
 quality: ## check coding style with pycodestyle and pylint
-	pylint xapi_db_load *.py
-	pycodestyle xapi_db_load  *.py
-	pydocstyle xapi_db_load *.py
+	pylint xapi_db_load
+	pycodestyle xapi_db_load
+	pydocstyle xapi_db_load
 	mypy xapi_db_load
-	isort --check-only --diff --recursive xapi_db_load *.py
+	isort --check-only --diff xapi_db_load
 	uv run python -m build
 	twine check dist/*
 	make selfcheck

pyproject.toml

@@ -82,6 +82,7 @@ quality = [
 doc = [
     {include-group = "test"},
     "build",
+    "doc8",
     "Sphinx",
     "sphinx-book-theme",
     "twine",