Poetry use suggestions

Makefile

@@ -1,7 +1,7 @@
 all: test
 
 uninstall:
-	pip freeze | grep -v "^-e" | sed "s/@.*//" | xargs pip uninstall -y
+	poetry env remove --all
 
 clean:
 	rm -rf build dist
@@ -12,24 +12,23 @@ install:
 	@# Install OpenFisca-Extension-Template for development.
 	@# The editable version of OpenFisca-Extension-Template allows contributors
 	@# to test as they code.
-	pip install --upgrade pip
 	poetry install --all-extras --sync
 
 format:
 	@# Do not analyse .gitignored files.
 	@# `make` needs `$$` to output `$`. Ref: http://stackoverflow.com/questions/2382764.
-	black `git ls-files | grep "\.py$$"`
-	isort `git ls-files | grep "\.py$$"`
-	pyproject-fmt pyproject.toml
-	ruff format `git ls-files | grep "\.py$$"`
+	poetry run black `git ls-files | grep "\.py$$"`
+	poetry run isort `git ls-files | grep "\.py$$"`
+	poetry run pyproject-fmt pyproject.toml
+	poetry run ruff format `git ls-files | grep "\.py$$"`
 
 lint: clean
 	@# Do not analyse .gitignored files.
 	@# `make` needs `$$` to output `$`. Ref: http://stackoverflow.com/questions/2382764.
-	black --check `git ls-files | grep "\.py$$"`
-	isort --check `git ls-files | grep "\.py$$"`
-	ruff check `git ls-files | grep "\.py$$"`
-	yamllint `git ls-files | grep "\.yaml$$"`
+	poetry run black --check `git ls-files | grep "\.py$$"`
+	poetry run isort --check `git ls-files | grep "\.py$$"`
+	poetry run ruff check `git ls-files | grep "\.py$$"`
+	poetry run yamllint `git ls-files | grep "\.yaml$$"`
 
 test: clean
-	PYTEST_ADDOPTS="--import-mode importlib" openfisca test --country-package=openfisca_country_template --extensions=openfisca_extension_template openfisca_extension_template/tests
+	PYTEST_ADDOPTS="--import-mode importlib" poetry run openfisca test --country-package=openfisca_country_template --extensions=openfisca_extension_template openfisca_extension_template/tests