[mod] #162: Add make isort rule

Align mypy

Makefile

-.PHONY: docs tests check check-format mypy pylint format build deploy deploy_test
+.PHONY: docs tests check check-format mypy isort pylint format build deploy deploy_test
 .SILENT: deploy deploy_test # do not echo commands with password
 
 # generate documentation
@@ -14,9 +14,12 @@ check: mypy pylint check-format
 
 # check static typing
 mypy:
-	 poetry run mypy duniterpy --ignore-missing-imports
-	 poetry run mypy tests --ignore-missing-imports
-	 poetry run mypy examples --ignore-missing-imports
+	poetry run mypy duniterpy --ignore-missing-imports
+	poetry run mypy tests --ignore-missing-imports
+	poetry run mypy examples --ignore-missing-imports
+
+isort:
+	poetry run isort duniterpy tests examples
 
 # check code errors
 pylint: