chore: replace tox workflow with Makefile

Makefile

@@ -0,0 +1,115 @@
+# We're using Make as a command runner, so always make (avoids need for .PHONY).
+MAKEFLAGS += --always-make
+
+help:  # Display help
+	@echo "Usage: make [target] [ARGS='additional args']\n\nTargets:"
+	@awk -F'#' '/^[a-z0-9-]+:/ { sub(":.*", "", $$1); print " ", $$1, "#", $$2 }' Makefile | column -t -s '#'
+
+all: format lint unit  # Run all quick, local commands
+
+benchmark:  # Run benchmark tests
+	uv run --group unit --group benchmark \
+		pytest -v --tb native \
+		test/benchmark \
+		testing/tests/benchmark \
+		$(ARGS)
+
+coverage:  # Run unit tests with coverage
+	COVERAGE_CORE=sysmon uv run --group unit --group coverage \
+		coverage run --source=ops,testing/src/scenario \
+		--branch -m pytest \
+		--ignore=test/smoke \
+		--ignore=test/integration \
+		--ignore=test/benchmark \
+		--ignore=testing/tests/benchmark \
+		--ignore=tracing/test \
+		--ignore=examples \
+		-v --tb native \
+		-W "ignore:Harness is deprecated:PendingDeprecationWarning" \
+		$(ARGS)
+	uv run --group coverage coverage report
+	mv .coverage .coverage-ops
+
+coverage-html:  # Generate HTML coverage report
+	uv run --group coverage coverage html
+
+coverage-report:  # Combine ops and tracing coverage reports
+	mkdir -p .report
+	uv run --group coverage coverage combine -a .coverage-ops
+	uv run --group coverage coverage combine -a .coverage-tracing
+	uv run --group coverage coverage xml -o .report/coverage.xml
+	uv run --group coverage coverage report
+
+coverage-tracing:  # Run tracing tests with coverage
+	cd tracing && \
+	COVERAGE_CORE=sysmon uv run --group unit --group coverage \
+	coverage run --source=. --branch -m pytest \
+	-v --tb native \
+	-W "ignore:Harness is deprecated:PendingDeprecationWarning" \
+	$(ARGS)
+	mv tracing/.coverage .coverage-tracing
+
+docs:  # Build documentation
+	MAKEFLAGS='' $(MAKE) -C docs html
+
+draft-release:  # Create a draft GitHub release
+	uv run --group release python release.py $(ARGS)
+
+fix:  # Auto-fix lint issues
+	uv run --group lint ruff check --preview --fix
+	uv run --group lint ruff format --preview
+
+format:  # Format the Python code
+	uv run --group lint ruff format --preview
+
+integration:  # Run integration tests
+	uv run --group integration \
+		pytest -vvv --tb native \
+		$(if $(ARGS),$(ARGS),test/integration/)
+
+lint:  # Lint, spell check and static type checking
+	uv run --group lint --group unit ruff check --preview
+	uv run --group lint --group unit ruff format --preview --check
+	uv run --group lint --group unit codespell $(ARGS)
+	uv run --group lint --group unit pyright $(ARGS)
+
+pebble:  # Run real Pebble tests
+	umask 0; pebble run --http=':4000' --create-dirs >/dev/null 2>&1 & sleep 1
+	PEBBLE=/tmp/pebble RUN_REAL_PEBBLE_TESTS=1 \
+	uv run --group unit \
+		pytest -v --tb native test/test_real_pebble.py $(ARGS)
+	killall -y 3m pebble
+
+post-release:  # Perform post-release actions
+	uv run --group release python release.py --post-release $(ARGS)
+
+smoke:  # Run smoke tests against a Juju controller
+	find test/charms/test_smoke \
+		\( -name '*.whl' -o -name '*.tar.gz' -o -name pyproject.toml -o -name uv.lock \) \
+		| xargs -r rm -vf
+	uv build --out-dir=test/charms/test_smoke --wheel .
+	cp test/charms/test_smoke/reference-pyproject.toml \
+		test/charms/test_smoke/pyproject.toml
+	uv --project test/charms/test_smoke \
+		add test/charms/test_smoke/ops-3.*.whl
+	uv run --group integration \
+		pytest -v --tb native --log-cli-level=INFO -s \
+		$(ARGS) test/smoke
+
+unit:  # Run unit tests, eg: make unit ARGS='-k test_status'
+	uv run --group unit --group xdist \
+		pytest -p no:benchmark \
+		--doctest-modules -n auto \
+		--ignore=docs \
+		--ignore=release.py \
+		--ignore=test/smoke \
+		--ignore=test/integration \
+		--ignore=test/benchmark \
+		--ignore=testing/tests/benchmark \
+		--ignore=tracing/test \
+		--ignore=examples \
+		--ignore=test/charms \
+		-v --tb native \
+		-W error \
+		-W "ignore:Harness is deprecated:PendingDeprecationWarning" \
+		$(ARGS)